verb (used with object), de·bil·i·tat·ed, de·bil·i·tat·ing.
- to make weak or feeble; enfeeble: The siege of pneumonia debilitated her completely.
- (tr) to make feeble; weaken
early 15c., from French débilitation (13c.), from Latin debilitationem (nominative debilitas) “a laming, crippling, weakening,” noun of action from past participle stem of debilitare “to weaken” (see debilitate).
1530s, from Latin debilitatus, past participle of debilitare “to weaken,” from debilis “weak” (see debility). Related: Debilitated; debilitating.