| inexorable |
| irascible(adjective, difficult, unstable, irritable, changeable) |
| malevolent(adjective, mean, nasty, unpleasant, horrible) |
| mean(adjective, hard, severe, nasty, cross) |
| meticulous(adjective, severe) |
| mopish(adjective, low, melancholy, depressed, ugly) |
| oppressive(adjective, tough, severe, firm, harsh) |
| overcast(adjective, sorrow, depress, sadness, emotion) |
| perverse(adjective, tough, severe, low, difficult) |
| prudish(adjective, tough, severe, firm, harsh) |
| rugged(adjective, tough, severe, harsh, cruel) |
| shadowy(adjective, sorrow, depress, sadness, emotion) |
| sharp(adjective, hard, severe, nasty, harsh) |
| short(adjective, severe, grumpy, bad-tempered, abrupt) |
| sober |
| steely |
| sunless(adjective, sorrow, depress, sadness, emotion) |
| tart(adjective, severe, grumpy, bad-tempered, tetchy) |
| temperamental(adjective, unstable, changeable) |
| unbending(adjective, severe) |