Origin: Latin suffix -ous
Unconscious has 6 different meanings across 2 categories:
that part of the mind wherein psychic activity takes place of which the person is unaware
"She realized her unconscious had been working overtime to suppress memories she desperately wanted to forget."
Unconscious mind
"The therapist suggested that his recurring nightmares were messages from his unconscious mind about unresolved childhood fears."
not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
"lay unconscious on the floor"
without conscious volition
"The car rolled to a stop because I had fallen into an unconscious state and could no longer control my actions."
(followed by `of') not knowing or perceiving
"happily unconscious of the new calamity at home"
Not awake; having no awareness.
"The driver fell unconscious after hitting his head on the dashboard, so the passengers had to call for help immediately."