Came from the slave days, and was considered a medical disease which needed curing if a slave was wanting to escape. So, metaphorically speaking, this word can be used as a noun if you feel trapped and ache for escape.:
Sometimes, when the magical world became too overwhelming, Julian would take trips to the most mundane places imaginable. He always went alone. But as of recently, he invited Cecilia, Nat and slash or Bellamy. "I should've brought you along much sooner. But even if I sometimes want to push away the magical world, doesn't mean I should push away you guys who helped me keep my sanity."