| indeterminate(adjective, dull, lifeless, monotonous, neutral) |
| indistinctive(adjective, strong, neutral) |
| indulgent(adjective, calm, kind, smooth, soft) |
| insinuating |
| insouciant |
| judicious(adjective, reasonable, sensible, restrained, modest) |
| languid(weak, feeble, lackluster, indecisive, feebleness) |
| light(adjective, calm, dull, quiet, weak) |
| lukewarm(adjective, weak, smooth, soft, gentle) |
| mannerly(smooth, polite, refined, polished, civil) |
| matte(adjective, dull, weak, dead, tedious) |
| mediocre(adjective, dull, weak, reasonable, sensible) |
| mellifluous(adjective, quiet, faint, melodious, muted) |
| merciful(adjective, calm, quiet, kind, soft) |
| middle-of-the-road(adjective, reasonable, sensible, restrained, modest) |
| milquetoast(adjective, tasteless) |
| mollifying(adjective, weak, smooth, soft, gentle) |
| mundane(adjective, dull, stupid, ordinary, boring) |
| nasty(adjective, unpleasant, disagreeable, distasteful, revolting) |
| nice(adjective, cool, kind, gentle, mild) |