Languid, a.
Etymology: [L. languidus, fr. languere to be faint or languid: cf. F. languide. See Languish.]
1. Drooping or flagging from exhaustion; indisposed to exertion; without animation; weak; weary; heavy; dull. " Languid, powerless limbs. " Armstrong. Fire their languid souls with Cato's virtue. Addison.
2. Slow in progress; tardy. " No motion so swift or languid." Bentley.
3. Promoting or indicating weakness or heaviness; as, a languid day. Feebly she laugheth in the languid moon. Keats. Their idleness, aimless and languid airs. W. Black.
Syn. -- Feeble; weak; faint; sickly; pining; exhausted; weary; listless; heavy; dull; heartless. -- Lan"guid*ly, adv. -- Lan"guid*ness, n.
Shades of meaning
Fernald has no entry of its own for languid; he lists it under faint.
He lists it without comment; the entries above explain its neighbors.