| bloodless(adjective, unfeeling, unemotional) |
| boorish(adjective, dull, slow, stupid) |
| bored(lethargic, languid, indolent) |
| careless(adjective, dull, idle, inactive, lethargic) |
| cold(adjective, calm, dull, flat, dead) |
| cool(adjective, calm, dull, flat, unemotional) |
| costive |
| deadening |
| debilitated(adjective, dull, uncertain, feeble, weary) |
| delayed(adjective, adverb, dull, low, slow) |
| delinquent(adjective, late, lazy, negligent, delayed) |
| depressed(adjective, dull, quiet, flat, slow) |
| desensitized(adjective, calm, dull, flat, unemotional) |
| dim-witted(adjective, simple, slow, stupid, unintelligent) |
| dirty(adjective, quiet, still, stationary) |
| disinterested(adjective, calm, dull, flat, unemotional) |
| drooping(adjective, dull, relaxed, lazy, listless) |
| droopy |
| easy-going(adjective, lazy, negligent, lax, lackadaisical) |
| filthy(adjective, quiet, still, stationary) |