To lose strength and become weak; to be in a state of weakness or sickness. from 14th c.
To pine away in longing for something; to have low spirits, especially from lovesickness. from 14th c.
To live in miserable or disheartening conditions. from 15th c.
To be neglected; to make little progress, be unsuccessful. from 17th c.
To make weak; to weaken, devastate. 15th-17th c.
To affect a languid air, especially disingenuously. from 18th c.
Lacking enthusiasm, energy, or strength; drooping or flagging from weakness, fatigue, or lack of energy
Heavy; dull; dragging; wanting spirit or animation; listless; apathetic.
A languet in an organ musical instrument.