| Term | Definition |
| quack | person dishonestly claiming authority |
| quaff | to drink deeply |
| quail | to lose courage; to turn frightened |
| qualm | feeling of doubt; temporary feeling of sickness |
| quandary | state of doubt or perplexity |
| quell | to suppress; to subdue |
| querulous | habitually complaining |
| quibble | to try to avoid by sophistication |
| quiescence | state of being passive; motionless |
| quiescent | at rest; dormant; torpid |
| quirk | peculiar behavior |
| quixotic | absurdly idealistic |
| quotidian | banal; everyday |
| rabble | mob; crowd; the lower classes of populace |
| raconteur | person who tells anecdotes |
| racy | full of zest or vigor; piquant |
| raffish | low; vulgar |
| ragamuffin | ragged; often disreputable person |
| rake | dissolute person; libertine |
| ramble | to move aimlessly from place to place |
| ramify | to be divided or subdivided; to branch out |
| rancorous | feeling bitterness; spitefulness |
| rant | to use extravagant language |
| rapacious | greedy (esp. for money) |
| rarefy | to make thin, less dense; to purify or refine |
| ratify | to approve and sanction formally |
| rave | act with excessive enthusiasm |
| reactionary | opposing progress |
| rebuff | to snub |
| recalcitrant | disobedient |
| recant | to take back as being false; to give up |
| recast | to cast or fashion anew |
| recidivism | relapse into antisocial or criminal behavior |
| reciprocity | granting of privileges in return for similar privileges |
| recitals | performances of music |
| recluse | person who lives alone and avoids people |
| recompense | to make payment; to reward; to punish |
| reconcile | to settles quarrel; to restore peace |
| recondite | little known; abstruse |
| recourse | turning to someone or something for help |
| recreancy | cowardice; apostate or deserter |
| rectitude | the quality of being straight; righteousness |
| recuperate | to become strong after illness, loss, exhaustion |
| redeem | to get back by payment; to compensate |
| redoubtable | formidable; causing fear |
| refine | to make or become pure or cultural |
| refractory | stubborn; unmanageable; intractable |
| refulgent | shining; brilliant |
| regale | to delight or entertain; to feast |
| regicide | crime of killing a king |
| reiterate | to say or do again several times |
| rejuvenation | becoming young in nature or appearance |
| relapse | to fall back again |
| remonstrate | to protest or object |
| renaissance | rebirth or revival |
| renascent | rising again into being or vigor |
| render | to deliver; to provide; to represent |
| renegade | deserter; to provide; to represent |
| renege | to deny; to renounce; to go back on a promise |
| renovate | to restore to earlier or better condition |
| renowned | celebrated; famous |
| repast | meal |
| repel | to refuse to accept; to cause dislike |
| reprisal | recurrence, renewal, or resumption of an action |
| reproach | to scold; to upbraid |
| reprobate | person hardened in sin; one devoid of decency |
| repudiate | to disown; to refuse to accept or pay |
| repulsive | causing a feeling of disgust |
| requiem | mass for the dead; solemn chant for the dead |
| requite | to repay; to give in return |
| rescind | to repeal; to give in return |
| resigned | unresisting; submissive |
| resilience | quality of quickly recovering the original shape |
| resort | to frequently visit |
| restive | refusing to move; reluctant to be controlled |
| resuscitation | coming back to consciousness |
| retard | to check; to hinder |
| reticent | reserved; not talkative |
| retrograde | tending toward a worse or previous state |
| revere | to have deep respect for |
| reverent | feeling or showing deep respect |
| ribald | crude; characterized by coarse indecent humor |
| riddle | puzzling person or thing |
| rift | split; crack; dissension |
| rivet | to fix; to take up; secure metal pin |
| roll | call; calling of names |
| rotund | rich and deep; plump and round |