Meaning

noun that part of the mind wherein psychic activity takes place of which the person is unaware

adjective not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead

adjective without conscious volition

originEtymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English conscious English unconscious From un- + conscious.

Etymology from Wiktionary, CC BY-SA 3.0