Synonyms of hardboiled

1 Syllable
crass, hard, tough
2 Syllables
stony, bloodless, tactless, unkind, aloof, heartless
3 Syllables
incurious, feelingless, hardened, thick-skinned, coldhearted, hardhearted, uncaring, obtuse, down-to-earth, hard-boiled, unfeeling
4 Syllables
unconcerned, determined
5 Syllables
unresponsive, unsusceptible, imperceptive