| unfeeling(adjective, mean, hard, cool, harsh) |
| hard(adjective, mean, cool, tough, severe) |
| obdurate(adjective, person, mean, hard, cool) |
| adamant(adjective, person, mean, hard, harsh) |
| callous(adjective, person, mean, hard, cool) |
| flinty(adjective, firm, rigid, stern, unyielding) |
| tough(adjective, mean, hard, cool, severe) |
| unsympathetic(adjective, person, mean, hard, cool) |
| inflexible(adjective, person, hard, firm, solid) |
| cold(adjective, mean, hard, cool, tough) |
| heartless(adjective, mean, hard, cool, tough) |
| stiff(adjective, hard, firm, careless, indifferent) |
| rocky(adjective, firm, harsh, coarse, irregular) |
| merciless(adjective, person, mean, hard, tough) |
| indifferent(adjective, mean, hard, cool, harsh) |
| steely(adjective, hard, firm, solid, hostile) |
| adamantine(adjective, firm, stiff, rigid, stubborn) |
| uncompassionate(adjective, person, mean, hard, cool) |
| chilly(adjective, person, hard, feelings, response) |
| cool(adjective, mean, hard, unpleasant, cold) |