| in the dumps(expression, idiom, sad, unhappy, pessimistic) |
| in the pits(expression, idiom, sad, unhappy, miserable) |
| in the toilet(expression, idiom, sad, unhappy, morose) |
| incontinent(vulgar, indecent, lewd) |
| indecorous(adjective, offensive, rude, foolish, stupid) |
| infamous |
| inferior(adjective, low, terrible, gloomy, miserable) |
| knowledge |
| lascivious(adjective, vulgar, indecent, lewd, aroused) |
| lecherous(adjective, vulgar, indecent, lewd, lustful) |
| let down(expression, sad, unhappy, pessimistic, morose) |
| libertine(vulgar, indecent, lewd) |
| libidinous(vulgar, indecent, lewd) |
| licentious(vulgar, indecent, lewd) |
| little |
| low-spirited(blue, sad, unhappy, miserable, dejected) |
| low down(expression, adjective, bad, vile, raw) |
| lowdown(adjective, bad, disgusting, vile, raw) |
| lowest(adjective, disgusting, vile, shameful, distasteful) |
| lugubrious(blue, sad, unhappy, miserable, dejected) |