Enfeeble

глагол ослаблять Синоним(ы): weaken

Большой англо-русский словарь

Enfeeble

transitive verb (enfeebled; enfeebling) Etymology: Middle English enfeblen, from Anglo-French enfebler, enfeblir, from en- + feble feeble to make feeble; deprive of strength Synonyms: see weakenenfeeblement noun

Merriam-Webster's Collegiate Dictionary