Adjective

(en adjective)

Without a heart; specifically, without feeling, emotion, or concern for others; uncaring.

His heartless actions and cold manner left her saddened and feeling alone.

* {{quote-news

, year=2012 , date=April 29 , author=Nathan Rabin , title=TV: Review: THE SIMPSONS (CLASSIC): “Treehouse of Horror III” (season 4, episode 5; originally aired 10/29/1992) citation , page= , passage=Mr. Burns is similarly perfectly cast as a heartless capitalist willing to do anything for a quick buck, even if it means endangering the lives of those around him and Marge elegantly rounds out the main cast as a good, pure-hearted and overly indulgent woman who sees the big, good heart (literally and metaphorically) of a monstrous man-brute. }}

Adjective

(en adjective)

Not expressing normal physical feeling

* 1897, Bram Stoker, Dracula

It is something like the way dame Nature gathers round a foreign body an envelope of some insensitive tissue which can protect from evil that which it would otherwise harm by contact.

Not expressing normal emotional feelings; cold; tactless; undiplomatic

* 1895, Grant Allen, The British Barbarians

Somehow, when Bertram Ingledew let it once be felt he did not wish to be questioned on any particular point, even women managed to restrain their curiosity: and he would have been either a very bold or a very insensitive man who would have ventured to continue questioning him any further.

* 1994, Jann Arden, "Insensitive" (song)

Oh I really should have known by the time you drove me home, / By the vagueness in your eyes, your casual good-byes, / By the chill in your embrace and the expression on your face, / That told me you might have some advice to give / On how to be insensitive .