a state of mental inactivity; lethargy or apathy; extreme sluggishness or stagnation of function

One of the things that impressed me about the band 10,000 Maniacs was that their singer, Natalie Merchant, managed to get the word torpor in one of her songs. That takes some real creativity. The song, by the way, is “Like the Weather,” from their 1987 album In My Tribe