Webster's Revised Unabridged Dictionary · 1913

Languish

Languish , intransitive verb

[Old English languishen, languissen, French languir, Latin languere; compare Greek {not transcribed} to slacken, {not transcribed} slack, Icelandic lakra to lag behind; prob. akin to English lag, lax, and perh. to English slack. See -ish.]

1.
To become languid or weak; to lose strength or animation; to be or become dull, feeble or spiritless; to pine away; to linger in a weak or deteriorating condition; to wither or fade.
We... do languish of such diseases. — 2 Esdras viii. 31
Cease, fond nature, cease thy strife, And let me languish into life. — Pope
For the fields of Heshbon languish. — Is. xvi. 8
2.
To assume an expression of weariness or tender grief, appealing for sympathy. — Tennyson
3.
To be neglected and unattended to; as, the proposal languished on the director's desk for months.

Languish , intransitive verb

To cause to droop or pine. [Obsolete] — Shakespeare

Languish , noun

See Languishment. [Obsolete or Poetic]
What, of death, too, That rids our dogs of languish? — Shakespeare
And the blue languish of soft Allia's eye. — Pope