languish

verb

• To lose strength and become weak; to be in a state of weakness or sickness.
• To pine away in longing for something; to have low spirits, especially from lovesickness.

  "He languished without his girlfriend"

• To live in miserable or disheartening conditions.

  "He languished in prison for years"

• To be neglected; to make little progress, be unsuccessful.

  "The case languished for years before coming to trial."

• To make weak; to weaken, devastate.
• To affect a languid air, especially disingenuously.