Meaning

noun a spontaneous loss of consciousness caused by insufficient blood to the brain

verb pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain

adjective deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc

originFrom Middle English faynt, feynt (“weak; feeble”), from Old French faint, feint (“feigned; negligent; sluggish”), past participle of feindre, faindre (“to feign; sham; work negligently”), from Latin fingere (“to touch, handle, form, shape, frame, form in thought, imagine, conceive, contrive, devise, feign”), ultimately from Proto-Indo-European *dʰeyǵʰ- (“to mold”). Cognate with feign and fiction…

Etymology from Wiktionary, CC BY-SA 3.0