| truncate | (verb) make shorter as if by cutting off | Synonyms: cut short |
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| (verb) approximate by ignoring all terms beyond a chosen one | - |
| (verb) replace a corner by a plane | - |
| ulcerate | (verb) affect with an ulcer | - |
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| (verb) undergo ulceration | - |
| ululate | (verb) emit long loud cries | Synonyms: howl, roar, wail, yaup, yawl |
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| uncrate | (verb) remove from the crate | - |
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| underestimate | (verb) make a deliberately low estimate | Synonyms: lowball |
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| (verb) make too low an estimate of | Synonyms: underrate |
| (verb) assign too low a value to | Synonyms: undervalue |
| underrate | (verb) make too low an estimate of | Synonyms: underestimate |
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| understate | (verb) represent as less significant or important | Synonyms: downplay, minimise, minimize |
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| undulate | (verb) increase and decrease in volume or pitch, as if in waves | - |
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| (verb) move in a wavy pattern or with a rising and falling motion | Synonyms: flap, roll, wave |
| (verb) stir up (water) so as to form ripples | Synonyms: cockle, riffle, ripple, ruffle |
| (verb) occur in soft rounded shapes | Synonyms: roll |
| update | (verb) modernize or bring up to date | - |
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| (verb) bring to the latest state of technology or supply with the latest data | - |
| (verb) bring up to date; supply with recent information | - |
| urinate | (verb) eliminate urine | Synonyms: make, make water, micturate, pass water, pee-pee, pee, piddle, piss, puddle, relieve oneself, spend a penny, take a leak, wee-wee, wee |
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| (verb) pass after the manner of urine | - |
| urticate | (verb) sting with or as with nettles and cause a stinging pain or sensation | Synonyms: nettle |
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| (verb) whip with or as with nettles | - |
| vacate | (verb) cancel officially | Synonyms: annul, countermand, lift, overturn, repeal, rescind, reverse, revoke |
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| (verb) leave behind empty; move out of | Synonyms: abandon, empty |
| (verb) leave (a job, post, or position) voluntarily | Synonyms: give up, renounce, resign |
| vaccinate | (verb) perform vaccinations or produce immunity in by inoculation | Synonyms: immunise, immunize, inoculate |
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| vacillate | (verb) move or sway in a rising and falling or wavelike pattern | Synonyms: fluctuate, waver |
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| (verb) be undecided about something; waver between conflicting positions or courses of action | Synonyms: hover, oscillate, vibrate |
| validate | (verb) make valid or confirm the validity of | - |
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| (verb) prove valid; show or confirm the validity of something | - |
| (verb) give evidence for | Synonyms: corroborate |
| (verb) declare or make legally valid | Synonyms: formalise, formalize |
| valuate | (verb) evaluate or estimate the nature, quality, ability, extent, or significance of | Synonyms: appraise, assess, evaluate, measure, value |
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| variegate | (verb) make something more diverse and varied | Synonyms: motley, vary |
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| (verb) change the appearance of, especially by marking with different colors | - |
| vaticinate | (verb) predict or reveal through, or as if through, divine inspiration | Synonyms: prophesy |
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| (verb) foretell through or as if through the power of prophecy | - |
| vegetate | (verb) engage in passive relaxation | Synonyms: veg out |
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| (verb) propagate asexually | - |
| (verb) grow like a plant | - |
| (verb) produce vegetation | - |
| (verb) establish vegetation on | - |
| (verb) grow or spread abnormally | - |
| (verb) lead a passive existence without using one's body or mind | - |
| vellicate | (verb) irritate as if by a nip, pinch, or tear | Synonyms: pinch |
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| (verb) touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements | Synonyms: tickle, titillate |
| venerate | (verb) regard with feelings of respect and reverence; consider hallowed or exalted or be in awe of | Synonyms: fear, revere, reverence |
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| ventilate | (verb) expose to cool or cold air so as to cool or freshen | Synonyms: air, air out, vent |
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| (verb) furnish with an opening to allow air to circulate or gas to escape | - |
| (verb) give expression or utterance to | Synonyms: give vent, vent |
| (verb) circulate through and freshen | - |
| (verb) expose to the circulation of fresh air so as to retard spoilage | - |
| vermiculate | (verb) decorate with wavy or winding lines | - |
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| vesicate | (verb) get blistered | Synonyms: blister |
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| vesiculate | (verb) cause to become vesicular or full of air cells | - |
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| (verb) become vesicular or full of air cells | - |
| vibrate | (verb) feel sudden intense sensation or emotion | Synonyms: thrill, tickle |
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| (verb) shake, quiver, or throb; move back and forth rapidly, usually in an uncontrolled manner | - |
| (verb) move or swing from side to side regularly | Synonyms: oscillate |
| (verb) sound with resonance | Synonyms: resonate |
| (verb) be undecided about something; waver between conflicting positions or courses of action | Synonyms: hover, oscillate, vacillate |
| vindicate | (verb) show to be right by providing justification or proof | Synonyms: justify |
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| (verb) clear of accusation, blame, suspicion, or doubt with supporting proof | - |
| (verb) maintain, uphold, or defend | - |
| violate | (verb) destroy | - |
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| (verb) destroy and strip of its possession | Synonyms: despoil, plunder, rape, spoil |
| (verb) act in disregard of laws, rules, contracts, or promises | Synonyms: breach, break, go against, infract, offend, transgress |
| (verb) force (someone) to have sex against their will | Synonyms: assault, dishonor, dishonour, outrage, rape, ravish |
| (verb) violate the sacred character of a place or language | Synonyms: desecrate, outrage, profane |
| (verb) fail to agree with; be in violation of; as of rules or patterns | Synonyms: break, go against |
| vitiate | (verb) take away the legal force of or render ineffective | Synonyms: invalidate, void |
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| (verb) make imperfect | Synonyms: deflower, impair, mar, spoil |
| (verb) corrupt morally or by intemperance or sensuality | Synonyms: corrupt, debase, debauch, demoralise, demoralize, deprave, misdirect, pervert, profane, subvert |
| vituperate | (verb) spread negative information about | Synonyms: rail, revile, vilify |
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| vociferate | (verb) utter in a very loud voice | Synonyms: shout out |
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