| hard-boiled(adjective, indifferent, detached, distant, remote) |
| unyielding |
| aloof(adjective, unfeeling, single, higher, unassertive) |
| austere(adjective, harsh, grim, painful, bleak) |
| bent(adjective, serious, resolute, persistent, unwavering) |
| bent on(expression, adjective, serious, resolute, persistent) |
| buckled down(expression, adjective, serious, resolute, persistent) |
| coldhearted(adjective, unfeeling, callous, hard-hearted, disciplined) |
| common(adjective, reasonable, sensible, sober, practical) |
| commonsense(adjective, reasonable, sensible, sober, practical) |
| constant(adjective, serious, resolute, persistent, pat) |
| decided(adjective, serious, resolute, persistent, unwavering) |
| decisive(adjective, serious, resolute, persistent, unwavering) |
| dogged(adjective, serious, resolute, persistent, unwavering) |
| down-to-earth(adjective, simple, reasonable, sensible, practical) |
| driven(adjective, serious, resolute, persistent, pat) |
| earnest(adjective, determined, serious, resolute, persistent) |
| easy(adjective, reasonable, sensible, sober, practical) |
| firm(adjective, tough, serious, resolute, persistent) |
| fixed(adjective, serious, resolute, persistent, unwavering) |