incapable of feeling or perceiving; deprived of sensation; unconscious, as a person after a violent blow.

without or not subject to a particular feeling or sensation

insensible to shame; insensible to the cold.

unaware; unconscious; inappreciative

We are not insensible of your kindness.

not perceptible by the senses; imperceptible

insensible transitions.

unresponsive in feeling.

not susceptible of emotion or passion; void of any feeling.

not endowed with feeling or sensation, as matter; inanimate.

noun

disinterest , impassivity , incuriosity , incuriousness , indifference , insensibleness , lassitude , lethargy , listlessness , phlegm , stolidity , stolidness , unconcern , uninterest , unresponsiveness , ansthesia , analgesia , apathy , carus , coma , dullness , inactivity , insusceptibility , narcoma , narcosis , numbness , stupefaction , stupor , torpor , trance , unconsciousness