adj. 25B6; adjective
an insensitive bully : HEARTLESS, unfeeling, inconsiderate, thoughtless, thick-skinned; hard-hearted, cold-blooded, uncaring, unconcerned, unsympathetic, unkind, callous, cruel, merciless, pitiless.
he was insensitive to her feelings : IMPERVIOUS TO, oblivious to, unaware of, unresponsive to, indifferent to, unaffected by, unmoved by, untouched by; informal in the dark about.
compassionate.