| dry(adjective, cold, dead, apathy, passive) |
| easy(adjective, dull, quiet, weak, slow) |
| energyless(adjective, dull, weak, easy, slow) |
| enslaved(adjective, subordinate) |
| enthralled(adjective, subordinate) |
| exhausted(adjective, uncertain, feeble, weary, tired) |
| faint(adjective, dull, weak, easy, slow) |
| feckless(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| feeble(adjective, dull, weak, easy, slow) |
| flaccid(adjective, loose, uncertain, feeble, hesitant) |
| flagging(adjective, dull, weak, easy, slow) |
| flimsy(adjective, loose, uncertain, feeble, hesitant) |
| forgetful(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| frail(adjective, weak, uncertain, feeble, hesitant) |
| groveling |
| halfhearted(adjective, cold, dead, apathy, passive) |
| hard-hearted(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| having spring fever(expression, adjective, idiom, dull, weary) |
| heartless |
| hebetudinous |