unfeeling; unkind; unsympathetic; harsh; cruel

heartless words; a heartless ruler.

Archaic . lacking courage or enthusiasm; spiritless; disheartened.

adjective

caring , compassionate , considerate , feeling , kind , nice , sympathetic , warmhearted

adjective

brutal , callous , cold-blooded * , cold fish * , cold-hearted * , cruel , hard , hard as nails , hard-boiled * , hard-hearted , harsh , inhuman , insensitive , merciless , obdurate , pitiless , ruthless , savage , thick-skinned * , uncaring , uncompassionate , unemotional , unfeeling , unkind , unsympathetic , cold-hearted , compassionless , hard-boiled , hardened , hardhearted , stonyhearted , acardiac , cold , hopeless , mean , pitiless. cruel