Acedia is a word from ancient Greek describing a state of listlessness or torpor, of not caring or not being concerned with one's position or condition in the world. It can lead to a state of being unable to perform one's duties in life. Its spiritual overtones make it related to but distinct from depression.[1] Acedia was originally noted as a problem among monks and other ascetics who maintained a solitary life.
The Oxford Concise Dictionary of the Christian Church [2] defines acedia as "a state of restlessness and inability either to work or to pray". Some see it as the precursor to sloth - one of the seven deadly sins.
--courtesy of Wikipedia
