| grim(adjective, dull, quiet, tough, severe) |
| sullen(adjective, upset, evil, rough, nasty) |
| glum(adjective, tough, evil, rough, nasty) |
| morose(adjective, tough, rough, nasty, low) |
| harsh(adjective, tough, severe, nasty, low) |
| gloomy(adjective, tough, blue, rough, nasty) |
| sour(adjective, mean, tough, severe, nasty) |
| moody(noun, adjective, happy, feelings, sadness) |
| dark(adjective, upset, tough, severe, evil) |
| sulky(adjective, evil, low, happy, sad) |
| saturnine(adjective, dull, quiet, tough, severe) |
| severe(adjective, hard, tough, severe, firm) |
| dismal(adjective, sorrow, gloomy, depress, sadness) |
| stern(adjective, hard, tough, severe, sharp) |
| surly(adjective, mean, tough, rough, nasty) |
| forbidding(adjective, person, tough, severe, evil) |
| glowering(adjective, person, tough, evil, offensive) |
| bleak(adjective, simple, tough, severe, low) |
| grave(adjective, dull, quiet, severe, harsh) |
| gruff(adjective, severe, low, sad, cross) |