strengthen - definition, thesaurus and related words from WordNet-Online

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Verb strengthen has 3 senses

strengthen, beef up, fortify - make strong or stronger; "This exercise will strengthen your upper body"; "strenghten the relations between the two countries"
--₁ is one way to change, alter, modify
Antonyms: weaken

Derived forms: noun strengthener₁, noun strengthening₂
Sample sentences:
Somebody ----s something
Somebody ----s somebody
Something ----s somebody
Something ----s something
strengthen - gain strength; "His body strengthened"
--₂ is one way to change
Antonyms: weaken

Derived form: noun strengthening₁
Sample sentences:
Something ----s
Somebody ----s
tone, tone up, strengthen - give a healthy elasticity to; "Let's tone our muscles"
--₃ is one way to exercise, work out
Sample sentence:
Somebody ----s something