insensate

Short definition from Wiktionary

Adjective

1. 1
   Having no sensation or consciousness; unconscious; inanimate.
2. 2
   Senseless; foolish; irrational; thoughtless.
3. 3
   Unfeeling, heartless, cruel, insensitive.
4. 4
   Not responsive to sensory stimuli; unfeeling.

Noun

1. 1
   One who is insensate.

Verb

1. 1
   To render insensate; to deprive of sensation or consciousness.