Insensible1. (a.) Imperceptible; destitute of the power of feeling or perceiving; as, insensible to cold weather or pain.
2. (a.) Not susceptible of emotion or passion; void of feeling; apathetic; unconcerned; indifferent; as, insensible to danger, fear, love, etc.; -- often used with of or to.
3. (a.) Incapable of being perceived by the senses; imperceptible. Hence: Progressing by imperceptible degrees; slow; gradual; as, insensible motion.
4. (a.) Not sensible or reasonable; meaningless.
Thesaurus Entries
a stranger to, abiotic, absorbed, anesthetic, anesthetized, apathetic, asleep, azoic, behind the curtain, behind the scenes, benumbed, blind, blind to, blindfold, blindfolded, bloodless, blunt, callous, camouflaged, caught napping, cold, comatose, concealed, cool, dead, dead to, deadened, deaf, deaf to, dim-sighted, disguised, dispassionate, dull, dumb, emotionless, engrossed, exanimate, hard, hardened, hidden, impalpable, impassible, impassive, imperceptible, imperceptive, impercipient, impervious, imponderable, in ignorance of, inanimate, inanimated, inappreciable, incognizant, inconsiderate, indifferent, indiscernible, indurated, inert, insensate, insensible to, insensitive, insentient, intangible, intent, invisible, latent, lifeless, lost to, mind-blind, mindless, mute, myopic, napping, nearsighted, nonconceiving, nonconscious, nonliving, nonunderstanding, not with it, numb, numbed, obdurate, oblivious, obtuse, out, out cold, out of it, out of sight, pachydermatous, phlegmatic, preoccupied, purblind, rapt, rocky, secret, senseless, shortsighted, sightless, soulless, stoic, stolid, submerged, thick-skinned, thick-witted, thoughtless, torpid, unaffected, unanimated, unapparent, unappreciable, unapprehending, unaware, unaware of, unbeheld, unbeholdable, uncomprehending, unconscious, unconscious of, undiscernible, undiscerning, unfeeling, unfelt, unhearing, uninsightful, unknowing, unmindful, unmindful of, unmoved, unnoticed, unobservable, unobserved, unperceivable, unperceived, unperceiving, unperceptive, unprehensive, unrealized, unrealizing, unseeable, unseeing, unseen, unsusceptible, unsuspecting, untouched, unviewed, unwitnessed, unwitting, viewless, witless