| immoral(adjective, evil, mysterious, threatening, nefarious) |
| implacable(appearance, terrible, hopeless) |
| in the sulks(expression, idiom, sullenness) |
| inexorable(appearance, terrible, hopeless) |
| infamous(adjective, evil, mysterious, threatening, nefarious) |
| infernal(adjective, evil, mysterious, threatening, nefarious) |
| intense |
| intractable(appearance, terrible, hopeless) |
| intricate(adjective, evil, mysterious, threatening, nefarious) |
| knotty(adjective, evil, mysterious, threatening, nefarious) |
| lamentable |
| low(adjective, unpleasant, horrible, disagreeable, dreadful) |
| low-down(adjective, unpleasant, horrible, disagreeable, dreadful) |
| major(adjective, unpleasant, horrible, disagreeable, dreadful) |
| merciless(appearance, terrible, hopeless) |
| messy(adjective, unpleasant, horrible, disagreeable, dreadful) |
| morbid |
| mysterious(adjective, evil, threatening, nefarious, spooky) |
| mystic(adjective, evil, mysterious, threatening, nefarious) |
| mystical(adjective, evil, mysterious, threatening, nefarious) |