insensible

 
Pronunciation: /ɪnˈsɛnsɪb(ə)l/

adjective

  • 1 [usually as complement] without one’s mental faculties, typically as a result of injury or intoxication; unconscious: they knocked each other insensible with their fists
  • (of a person or bodily extremity) without feeling; numb: the horny and insensible tip of the beak
  • 2 (insensible of/to) unaware of or indifferent to: they slept on, insensible to the headlight beams
  • 3too small or gradual to be perceived; inappreciable: varying by insensible degrees

Derivatives

insensibly

adverb

Origin:

late Middle English (also in the senses 'unable to be perceived' and 'incapable of physical sensation'): partly from Old French insensible (from Latin insensibilis, from in- 'not' + sensibilis, from sensus 'sense'), partly from in-1 'not' + sensible