A prefix is a letter group placed at the beginning of a word to change its meaning. Common ones like “un-“, “re-“, and “pre-” are used in words such as “unhappy,” “rewrite,” and “preview.” These parts don’t stand alone but combine with other words to make new ones. Knowing how prefixes work helps you understand and read words faster without needing full definitions every time.
This 100 Prefix Words List supports better English vocabulary by building stronger word knowledge using common prefix forms.
200 Prefix Words List
| Serial | Prefix | Meaning | Examples |
|---|---|---|---|
| 1. | Un- | Not; opposite of | Unhappy, untidy, unfair, unsure, unkind |
| 2. | Re- | Again; back | Reread, rebuild, recover, revisit, rewrite |
| 3. | Dis- | Not; opposite of | Dislike, disconnect, disagree, disapprove |
| 4. | In- | Not; into | Invisible, incomplete, inhale, invade |
| 5. | Pre- | Before; prior to | Preheat, prepay, preview, pretest, |
| 6. | Mis- | Wrong; incorrect | Misbehave, mislead, misplace, misprint |
| 7. | Over- | Excessive; too much | Overcome, overlook, overeat, overreact |
| 8. | Inter- | Between; among | Interact, interfere, interconnect, |
| 9. | Sub- | Under; below | Submerge, subside, subzero, subtitle |
| 10. | Super- | Above; beyond | Supersize, superhero, supernatural |
| 11. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 12. | Multi- | Many; much | Multiply, multitask, multifunctional |
| 13. | Anti- | Against; opposite of | Antisocial, antiwar, antibiotic, |
| 14. | Micro- | Small; minute | Microscope, microwave, microorganism |
| 15. | Auto- | Self; own | Autograph, automatic, autobiography |
| 16. | Post- | After; later | Postpone, postwar, postscript, |
| 17. | Pre- | Before; prior to | Preschool, prepare, prevent, preside |
| 18. | Neo- | New; recent | Neolithic, neoclassical, neo-Nazi |
| 19. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict |
| 20. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 21. | De- | Opposite of; remove | Defrost, defuse, devalue, deactivate, |
| 22. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 23. | Multi- | Many; much | Multiply, multitask, multifunctional, |
| 24. | Anti- | Against; opposite of | Antisocial, antiwar, antibiotic, |
| 25. | Micro- | Small; minute | Microscope, microwave, microorganism, |
| 26. | Auto- | Self; own | Autograph, automatic, autobiography, |
| 27. | Post- | After; later | Postpone, postwar, postscript, |
| 28. | Pre- | Before; prior to | Preschool, prepare, prevent, preside, |
| 29. | Neo- | New; recent | Neolithic, neoclassical, neo-Nazi, |
| 30. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict, |
| 31. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 32. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 33. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 34. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 35. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, |
| 36. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 37. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 38. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 39. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 40. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall |
| 41. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 42. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 43. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 44. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 45. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 46. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 47. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 48. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 49. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 50. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 51. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 52. | Multi- | Many; much | Multiply, multitask, multifunctional, |
| 53. | Anti- | Against; opposite of | Antisocial, antiwar, antibiotic, |
| 54. | Micro- | Small; minute | Microscope, microwave, microorganism, |
| 55. | Auto- | Self; own | Autograph, automatic, autobiography, |
| 56. | Post- | After; later | Postpone, postwar, postscript, |
| 57. | Pre- | Before; prior to | Preschool, prepare, prevent, preside, |
| 58. | Neo- | New; recent | Neolithic, neoclassical, neo-Nazi, |
| 59. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict, |
| 60. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 61. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 62. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 63. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 64. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 65. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 66. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 67. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 68. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 69. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 70. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 71. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 72. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 73. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 74. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 75. | Multi- | Many; much | Multiply, multitask, multifunctional, |
| 76. | Anti- | Against; opposite of | Antisocial, antiwar, antibiotic, |
| 77. | Micro- | Small; minute | Microscope, microwave, microorganism, |
| 78. | Auto- | Self; own | Autograph, automatic, autobiography, |
| 79. | Post- | After; later | Postpone, postwar, postscript, |
| 80. | Pre- | Before; prior to | Preschool, prepare, prevent, preside, |
| 81. | Neo- | New; recent | Neolithic, neoclassical, neo-Nazi, |
| 82. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict, |
| 83. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 84. | Con- | Together; with | Connect, confer, concur, conform, |
| 85. | Dis- | Not; opposite of | Dislike, disconnect, disagree, disapprove |
| 86. | En- | Put into; cause to | Enclose, enable, enrich, encircle, |
| 87. | Extra- | Beyond; additional | Extracurricular, extraordinary, |
| 88. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 89. | Inter- | Between; among | Interact, interfere, interconnect, |
| 90. | Mis- | Wrong; incorrect | Misbehave, mislead, misplace, misprint |
| 91. | Over- | Excessive; too much | Overcome, overlook, overeat, overreact |
| 92. | Per- | Through; completely | Perceive, persist, persuade, perforate, |
| 93. | Pro- | Forward; in favor of | Promote, proceed, protect, provide, |
| 94. | Re- | Again; back | Reread, rebuild, recover, revisit, rewrite |
| 95. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 96. | Sub- | Under; below | Submerge, subside, subzero, subtitle |
| 97. | Super- | Above; beyond | Supersize, superhero, supernatural |
| 98. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 99. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 100. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 101. | Uni- | One; single | Unicycle, unicorn, unison, uniform, |
| 102. | Bi- | Two; twice | Bicycle, binoculars, bilingual, |
| 103. | Tri- | Three | Tricycle, triangle, trilogy, |
| 104. | Quad- | Four | Quadrant, quadruple, quadratic, |
| 105. | Multi- | Many; much | Multiply, multitask, multifunctional, |
| 106. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 107. | Anti- | Against; opposite of | Antisocial, antiwar, antibiotic, |
| 108. | Micro- | Small; minute | Microscope, microwave, microorganism, |
| 109. | Auto- | Self; own | Autograph, automatic, autobiography, |
| 110. | Post- | After; later | Postpone, postwar, postscript, |
| 111. | Pre- | Before; prior to | Preschool, prepare, prevent, preside, |
| 112. | Neo- | New; recent | Neolithic, neoclassical, neo-Nazi, |
| 113. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict, |
| 114. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 115. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 116. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 117. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 118. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 119. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 120. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 121. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 122. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 123. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 124. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 125. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 126. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 127. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 128. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 129. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 130. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 131. | Multi- | Many; much | Multiply, multitask, multifunctional, |
| 132. | Semi- | Half; partly | Semifinal, semiannual, semicolon, |
| 133. | Anti- | Against; opposite of | Antisocial, antiwar, antibiotic, |
| 134. | Micro- | Small; minute | Microscope, microwave, microorganism, |
| 135. | Auto- | Self; own | Autograph, automatic, autobiography, |
| 136. | Post- | After; later | Postpone, postwar, postscript, |
| 137. | Pre- | Before; prior to | Preschool, prepare, prevent, preside, |
| 138. | Neo- | New; recent | Neolithic, neoclassical, neo-Nazi, |
| 139. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict, |
| 140. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 141. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 142. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 143. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 144. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 145. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 146. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 147. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 148. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 149. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 150. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 151. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 152. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 153. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 154. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 155. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 156. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 157. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 158. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 159. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 160. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 161. | Over- | Excessive; too much | Overcome, overlook, overeat, overreact |
| 162. | Per- | Through; completely | Perceive, persist, persuade, perforate, |
| 163. | Pro- | Forward; in favor of | Promote, proceed, protect, provide, |
| 164. | Re- | Again; back | Reread, rebuild, recover, revisit, rewrite |
| 165. | Un- | Not; opposite of | Unhappy, untidy, unfair, unsure, unkind |
| 166. | In- | Not; into | Invisible, incomplete, inhale, invade |
| 167. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 168. | Pre- | Before; prior to | Preschool, prepare, prevent, preside, |
| 169. | Ex- | Former; out of | Ex-wife, ex-president, ex-convict, |
| 170. | Co- | Together; joint | Coexist, cooperate, coauthor, |
| 171. | De- | Opposite of; remove | Defrost, devalue, deactivate, declassify |
| 172. | En- | Put into; cause to | Enclose, enable, enrich, encircle, |
| 173. | Extra- | Beyond; additional | Extracurricular, extraordinary, |
| 174. | Inter- | Between; among | Interact, interfere, interconnect, |
| 175. | Mis- | Wrong; incorrect | Misbehave, mislead, misplace, misprint |
| 176. | Sub- | Under; below | Submerge, subside, subzero, subtitle |
| 177. | Super- | Above; beyond | Supersize, superhero, supernatural |
| 178. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 179. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 180. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 181. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 182. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 183. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 184. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 185. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 186. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 187. | Fore- | Before; in advance | Foresee, forecast, forehead, forearm, |
| 188. | Trans- | Across; beyond | Transfer, transform, transatlantic, |
| 189. | Under- | Below; insufficient | Underestimate, underground, undergo, |
| 190. | Hyper- | Excessive; beyond | Hyperactive, hypersensitive, hyperbole, |
| 191. | Mega- | Great; million | Megabyte, megaphone, megalith, |
| 192. | Mini- | Small; miniature | Minibus, miniskirt, minivan, |
| 193. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
| 194. | Up- | Higher; increased | Uplift, upgrade, upturn, upstairs, |
| 195. | Down- | Lower; decreased | Downsize, downturn, downgrade, downfall, |
| 196. | Mid- | Middle; halfway | Midnight, midpoint, midyear, midway, |
| 197. | Re- | Again; back | Reread, rebuild, recover, revisit, rewrite |
| 198. | Un- | Not; opposite of | Unhappy, untidy, unfair, unsure, unkind |
| 199. | In- | Not; into | Invisible, incomplete, inhale, invade |
| 200. | Out- | Beyond; out of | Outshine, outgrow, outlive, outfield, |
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