| impassive(adjective, cool, detached, blank, sober) |
| impersonal(adjective, cool, detached, blank, sober) |
| in cold blood(expression, adjective, idiom, cool, flat) |
| indifferent(adjective, cool, detached, blank, sober) |
| interminable(adjective, dull, flat, stupid, dead) |
| irritating(adjective, dull, boring, tedious, annoying) |
| jading(adjective, dull, boring, tedious, irritating) |
| jejune(adjective, dull, boring, tedious, lifeless) |
| jumping-off place |
| laborious(adjective, dull, boring, tedious, irritating) |
| lackluster(adjective, dull, simple, flat, clean) |
| laid back(expression, adjective, cool, detached, blank) |
| lifeless(adjective, dull, simple, flat, plain) |
| literal(adjective, simple, flat, clean, plain) |
| lost |
| lowly(adjective, simple, clean, plain, ordinary) |
| lusterless(adjective, bad, simple, clean, plain) |
| matter-of- fact(expression, adjective, simple, clean, plain) |
| matter-of-fact(adjective, cool, simple, plain, ordinary) |
| matter of fact(expression, adjective, idiom, bad, detached) |