Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Thesaurus

weaken

verb

Synonyms and Antonyms of weaken

  1. 1 to diminish the physical strength of <weeks of hardship in the desert had greatly weakened them> Synonyms debilitate, devitalize, enervate, enfeeble, etiolate, prostrate, sap, soften, tire, waste Related Words cripple, disable, hamstring, incapacitate; deplete, depress, exhaust, impoverish, unman, wash out; damage, harm, hurt, impair, injure, invalid, lay up; break down, grind (down), wear down, wear out; paralyze Near Antonyms energize, invigorate, recruit, rejuvenate, vitalize; harden, season, toughen Antonyms beef (up), fortify, strengthen

  2. 2 to lose bodily strength or vigor <the bodybuilder weakened once she eased off on her workouts> Synonyms decay, droop, emaciate, fade, fail, flag, go, lag, languish, sag, sink, waste (away), wilt, wither Related Words break down, wear out; yield; degenerate, deteriorate, rot, run down Near Antonyms convalesce, rally, rebound, recover, recuperate; gain

  3. 3 to alter (something) for the worse with the addition of foreign or lower-grade substances <weakened the juice with too much water> Synonyms cut, dilute, extend, lace, sophisticate, thin, water down, adulterateRelated Words load; befoul, contaminate, corrupt, defile, dirty, envenom, foul, infect, poison, pollute, soil, spoil, sully, taint; cheapen, debase, degrade; manipulate, misrepresent, tamper (with); counterfeit, fake, falsify, fudge; doctor, spike; attenuate, moderate, qualify, temperNear Antonyms fertilize, lard; augment, reinforce (also reenforce), supplement; decontaminate, purify; clarify, clean, cleanse, distill (also distil), filter, flush, leach, pasteurize, purge, refine; better, enhance, improve; compact, concentrate, condenseAntonyms enrich, fortify, richen, strengthen





Seen and Heard

What made you want to look up weaken? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the range of perception or understanding

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe disapprove perplex reduce
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ