agnosia
A neurological condition where a person cannot recognize objects, faces, sounds, or other sensory information despite intact senses. Used in medical and psychological contexts.
A patient with agnosia may not recognize a key placed in front of them, even though they can see it.
Aphasia: language impairment, while 失認症 affects sensory recognition.
From 失 (loss) + 認 (recognition) + 症 (condition/syndrome). A modern medical compound.