| loathsome(adverb, low, base, coarse, vile) |
| low-browed(adjective, sorrow, depress, sadness, emotion) |
| lowering(adjective, sorrow, depress, sadness, emotion) |
| lowery(adjective, sorrow, depress, sadness, emotion) |
| lugubrious(adjective, sorrow, depress, sadness, emotion) |
| lupine(adjective, harsh, violent, wild, cruel) |
| lurid(adjective, sorrow, depress, sadness, emotion) |
| mad |
| madding |
| malevolent(adjective, mean, strong, severe, harsh) |
| malignant |
| maniac |
| maniacal |
| melancholy(adjective, sorrow, depress, sadness, emotion) |
| mirk(adjective, sorrow, depress, sadness, emotion) |
| morose(adjective, sorrow, depress, sadness, emotion) |
| mortuary |
| murk(adjective, sorrow, depress, sadness, emotion) |
| murky(adjective, sorrow, depress, sadness, emotion) |
| muzzy(adjective, sorrow, depress, sadness, emotion) |