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

Thesaurus

knock out

verb

Synonyms and Antonyms of knock out

  1. to use up all the physical energy of <the entire staff knocked itself out getting the project finished on time> Synonyms break, burn out, bust, do in, do up, drain, fag, fatigue, frazzle, harass, kill, exhaust, outwear, tire, tucker (out), wash out, wear, wear out, wearyRelated Words debilitate, enervate, enfeeble, sap, waste, weakenNear Antonyms activate, energize, invigorate, rejuvenate, strengthen, vitalize; relax, rest, unwind




Learn More about knock out


Seen and Heard

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

WORD OF THE DAY

a talk on a religious or moral theme

Get Word of the Day daily email!