| No. | Item | Definition |
|---|---|---|
| 1. | abolish | formally end a system or rule |
| 2. | abrogate | formally abolish or cancel something |
| 3. | annul | declare something invalid or canceled |
| 4. | attenuate | weaken or reduce force |
| 5. | balance | offset with an equal force |
| 6. | bar | prevent or exclude |
| 7. | belie | contradict or show as false |
| 8. | block | prevent progress or effect |
| 9. | blunt | make less forceful or effective |
| 10. | brush aside | dismiss without serious attention |
| 11. | cancel | make something no longer valid |
| 12. | challenge | question the truth or validity |
| 13. | check | restrain or stop progress |
| 14. | compensate for | offset a loss or effect |
| 15. | contest | dispute or challenge formally |
| 16. | contradict | assert the opposite of something |
| 17. | controvert | argue against or deny |
| 18. | counteract | act against and reduce an effect |
| 19. | counterbalance | balance with an opposing force |
| 20. | countervail | offset or counterbalance |
| 21. | deny | state that something is untrue |
| 22. | disaffirm | deny or reject legally |
| 23. | disallow | refuse to permit or accept |
| 24. | disavow | deny responsibility or support |
| 25. | disclaim | deny ownership or responsibility |
| 26. | discount | treat as unimportant or invalid |
| 27. | dismiss | reject as unworthy or untrue |
| 28. | disown | refuse to acknowledge as yours |
| 29. | disprove | show that something is false |
| 30. | dispute | question or deny the truth |
| 31. | efface | wipe out or remove |
| 32. | eliminate | remove from consideration or effect |
| 33. | erode | gradually weaken or destroy |
| 34. | explode | disprove a theory or myth |
| 35. | extinguish | put an end to something |
| 36. | falsify | show to be false |
| 37. | foil | prevent a plan from succeeding |
| 38. | frustrate | prevent success or fulfillment |
| 39. | gainsay | deny or contradict someone |
| 40. | give the lie to | show something to be false |
| 41. | halt | bring to a stop |
| 42. | impeach | challenge credibility or validity |
| 43. | inhibit | hinder or prevent action |
| 44. | invalidate | make something invalid or unsound |
| 45. | kill | end or destroy an effect |
| 46. | knock out | remove or make ineffective |
| 47. | lay to rest | settle or disprove finally |
| 48. | minimize | reduce to the smallest degree |
| 49. | mitigate | make less severe or harmful |
| 50. | neutralize | make something ineffective or harmless |
| 51. | nix | cancel or reject informally |
| 52. | null out | reduce to no effect |
| 53. | nullify | make legally or practically ineffective |
| 54. | offset | balance or counteract an effect |
| 55. | oppose | act or argue against |
| 56. | overcome | successfully counter an effect |
| 57. | override | overrule or cancel |
| 58. | overrule | reject by higher authority |
| 59. | overturn | reverse or invalidate a decision |
| 60. | pooh-pooh | dismiss as foolish or unimportant |
| 61. | preclude | make something impossible |
| 62. | prevent | stop something from happening |
| 63. | put paid to | end or destroy hopes |
| 64. | quash | reject or cancel officially |
| 65. | quell | suppress or put down |
| 66. | rebuff | reject bluntly or firmly |
| 67. | recant | formally withdraw a belief or statement |
| 68. | refute | prove a claim to be false |
| 69. | reject | refuse to accept as true |
| 70. | renounce | formally reject or give up |
| 71. | repeal | officially revoke a law |
| 72. | repudiate | reject or deny strongly |
| 73. | rescind | officially cancel a decision or agreement |
| 74. | retract | take back a statement or claim |
| 75. | reverse | change something to the opposite |
| 76. | revoke | officially cancel or withdraw something |
| 77. | set aside | annul or disregard officially |
| 78. | set off | balance or offset something |
| 79. | shatter | destroy a belief or argument |
| 80. | smother | suppress or stop from developing |
| 81. | squelch | suppress or silence forcefully |
| 82. | stifle | suppress or prevent expression |
| 83. | stop | prevent from continuing or happening |
| 84. | strike down | invalidate by legal ruling |
| 85. | subvert | undermine or overturn from within |
| 86. | suppress | prevent expression or effect |
| 87. | terminate | bring to an end |
| 88. | throw out | reject or dismiss |
| 89. | thwart | prevent something from succeeding |
| 90. | torpedo | destroy or ruin a plan |
| 91. | toss out | reject or discard informally |
| 92. | undercut | weaken support or credibility |
| 93. | undermine | weaken or damage support |
| 94. | undo | reverse the effect of something |
| 95. | veto | reject or block officially |
| 96. | vitiate | spoil or invalidate something legally |
| 97. | void | make something legally invalid |
| 98. | wave aside | dismiss as unimportant |
| 99. | wipe out | remove or destroy completely |
| 100. | withdraw | take back a statement or offer |
