Antonyms of verb weaken
2 of 5 senses of weaken
Sense 1
weaken -- (lessen the strength of; "The fever weakened his body")
Antonym of strengthen (Sense 1)
=> strengthen, beef up, fortify -- (make strong or stronger; "This exercise will strengthen your upper body"; "strengthen the relations between the two countries")
Sense 2
weaken -- (become weaker; "The prisoner's resistance weakened after seven days")
Antonym of strengthen (Sense 2)
=> strengthen -- (gain strength; "His body strengthened")
Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb weaken
5 senses of weaken
Sense 1
weaken -- (lessen the strength of; "The fever weakened his body")
=> change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")
Sense 2
weaken -- (become weaker; "The prisoner's resistance weakened after seven days")
=> decrease, diminish, lessen, fall -- (decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper")
Sense 3
sabotage, undermine, countermine, counteract, subvert, weaken -- (destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war")
=> disobey -- (refuse to go along with; refuse to follow; be disobedient; "He disobeyed his supervisor and was fired")
Sense 4
de-escalate, weaken, step down -- (reduce the level or intensity or size or scope of; "de-escalate a crisis")
=> decrease, lessen, minify -- (make smaller; "He decreased his staff")
Sense 5
dampen, damp, soften, weaken, break -- (lessen in force or effect; "soften a shock"; "break a fall")
=> deaden, blunt -- (make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation; "Terror blunted her feelings"; "deaden a sound")