| demanding |
| detached(adjective, person, hard, indifferent, feelings) |
| fierce(adjective, mean, hard, tough, evil) |
| forbidding(adjective, person, hard, tough, harsh) |
| impervious(adjective, calm, bad, cold, restrained) |
| implacable(adjective, mean, hard, tough, evil) |
| iron-hearted(adjective, bad, hard, tough, severe) |
| marble(adjective, bad, cold, detached, aloof) |
| rigorous(adjective, hard, tough, harsh, cruel) |
| self-centered(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| self-seeking |
| senseless(adjective, bad, hard, tough, severe) |
| strict |
| stubborn(adjective, characteristic, quality, mean, hard) |
| unaffected(adjective, unmoved, unchanged) |
| uncompromising(adjective, mean, hard, tough, harsh) |
| untouched(adjective, calm, restrained, unconcerned, subdued) |
| atrocious(adjective, evil, nasty, harsh, vicious) |
| bestial(adjective, evil, nasty, harsh, vicious) |
| cold fish(expression, adjective, calm, mean, hard) |