| flat(adjective, detached, impassive, unresponsive, laid-back) |
| flinthearted |
| flinty(adjective, rocky, pebbly) |
| frosted |
| frozen |
| glacial(adjective, detached, impassive, unresponsive, insensitive) |
| going with the flow(expression, adjective, idiom, detached, impassive) |
| habituated(adjective, hard, unfeeling, unsympathetic, prepared) |
| hard-as-nails(adjective, hard, unfeeling, unsympathetic, prepared) |
| hard-bitten(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard-boiled(adjective, hard, cold, indifferent, detached) |
| hard as nails(expression, adjective, idiom, hard, indifferent) |
| hard boiled(adjective, aloof, unfeeling, senseless) |
| hard of heart(expression, idiom) |
| hardboiled(adjective, unfeeling, callous, hard-hearted, disciplined) |
| hardhearted hateful(adjective, person) |
| hatchetjob(adjective, mean, hard, harsh, cold) |
| haughty(adjective, person) |
| heedless(adjective, person, evil) |
| ill-natured(adjective, person, evil) |