listless

Lacking energy or disinclined to exert effort; lethargic.

Characterized by a lack of energy or interest.

Indifferent to or taking no interest in what happens about one; languid and unheeding: as, a listless hearer or spectator.

Marked by languid inactivity; manifesting relaxed attention; inanimate: as, a listless attitude.

Synonyms Listless, Careless, Supine, Indolent. The listless and the careless do not care or desire; the supine and the indolent do not care enough to conquer their shrinking from activity or work. The words may all indicate a temporary state or a permanent element of character; indolent generally indicates the latter. (See idle.) Careless is not caring; supine is literally lying flat on one’s back, not rousing one’s self at all, ignobly indifferent; listless, indifferent and languid. Listless does not necessarily imply blame.