Word Origin & History
insensate
1519, from L.L. insensatus "irrational, foolish," from L. in- "not" + sensatus "gifted with sense." Insensate means "not capable of feeling sensation," often "inanimate;" insensible means "lacking the power to feel with the senses," hence, often, "unconscious;" insensitive (1610), from M.L. sensitivus, means "having little or no reaction to what is perceived by one's senses," often "tactless."