ENFEEBLE
enfeeble, debilitate, drain
(verb) make weak; “Life in the camp drained him”
Source: WordNet® 3.1
Etymology
Verb
enfeeble (third-person singular simple present enfeebles, present participle enfeebling, simple past and past participle enfeebled)
(transitive) To make feeble.
Synonyms
• weaken
Source: Wiktionary
En*fee"ble, v. t. [imp. & p. p. Enfeebled; p. pr. & vb. n.
Enfeebling.] Etym: [OF. enfeblir, enfeiblir; pref. en- (L. in) +
feble, F. faible, feeble. See Feeble.]
Definition: To make feeble; to deprive of strength; to reduce the strength
or force of; to weaken; to debilitate.
Enfeebled by scanty subsistence and excessive toil. Prescott.
Syn.
– To weaken; debilitate; enervate.
Source: Webster’s Unabridged Dictionary 1913 Edition