Weaken Weaken synonyms soften weaken and soften undermine weaken and undermine dilute weaken and dilute enfeeble weaken and enfeeble reduce weaken and reduce debilitate weaken and debilitate enervate weaken and enervate impair weaken and impair diminish weaken and diminish fade weaken and fade Full list of synonyms (2280) Weaken antonyms strengthen weaken and strengthen fortify weaken and fortify enhance weaken and enhance increase weaken and increase intensify weaken and intensify improve weaken and improve invigorate weaken and invigorate energize weaken and energize grow weaken and grow reinforce weaken and reinforce Full list of antonyms (83) Share this picture Share this image Share this picture Share this image