| icy(adjective, cool, aloof, distant) |
| insusceptible(adjective, cool, blank, aloof, unemotional) |
| leaden(adjective, action, dull, weak, easy) |
| passive(adjective, dull, quiet, gentle, careless) |
| pedestrian(adjective, excite) |
| sad(adjective, blue, low, happy, unhappy) |
| slack(adjective, dull, quiet, flat, heavy) |
| slothful(adjective, dull, sad, careless, indifferent) |
| soft(adjective, dull, quiet, weak, kind) |
| sterile(adjective, dull, excite, boring, uninteresting) |
| tedious(adjective, dull, weak, stupid, boring) |
| uninteresting(adjective, dull, weak, flat, cold) |
| unresponsive(adjective, dull, quiet, hard, cool) |
| wooden(adjective, dull, quiet, cool, flat) |
| asleep |
| bored(tired, uninterested, lethargic, languid, indolent) |
| characterless(adjective, dull, weak, stupid, feeble) |
| colourless |
| defunct(adjective, dull, cold, lifeless, late) |
| desolate(adjective, happy) |