| petrified(verb, adjective, set, hard, firm) |
| ruthless(adjective, hard, tough, severe, harsh) |
| steely(adjective, hard, firm, solid, cold) |
| taut(adjective, hard, firm, solid, stiff) |
| unconcerned(adjective, hard, cool, careless, indifferent) |
| unrepentant(adjective, impenitent, impenitence) |
| acclimatized(adjective, strong, fit, healthy, well) |
| aloof(adjective, hard, cool, indifferent, blank) |
| braced(verb, strengthened) |
| coagulated(verb, adjective, congealed) |
| cold-hearted(adjective, hard, tough, severe, attitude) |
| consolidated(verb, adjective, set, strong, hard) |
| detached(adjective, indifferent, unfeeling, unsympathetic, pitiless) |
| disciplined(usual, skilled, experienced, established, seasoned) |
| frozen(adjective, hard, firm, solid, rigid) |
| harden |
| hardheaded(adjective, determined, resolute, uncompromising, unshakeable) |
| iconic(adjective, exemplary) |
| impassive(adjective, hard, cool, careless, indifferent) |
| inexorable(adjective, hard, tough, harsh, determined) |