Dictionary

A state of the body or mind caused by exhaustion or disease and characterized by a languid or weary feeling; lassitude; an instance of this.

Example: languor of convalescence

Melancholy caused by lovesickness, sadness, etc.; an instance of this.

Dullness, sluggishness; lack of vigour; stagnation.

Listless indolence or inactivity, especially if enjoyable or relaxing; dreaminess; an instance of this.

To languish.