Yours, Etc.: Origins and Uses of 8 Sign-Offs
1777, from Portuguese or Spanish curare, a corruption of the name in the Carib language of the Macusi Indians of Guyana, wurali or wurari, which had a sort of click sound at the beginning, and is said to mean "he to whom it comes falls."
curare cu·ra·re or cu·ra·ri (ku-rä'rē, kyu-)
An extract obtained from several tropical American woody plants, especially Chondrodendron tomentosum, used as an arrow poison by some Indian peoples of South America.
A purified preparation or alkaloid obtained from Chondrodendron tomentosum, used to relax skeletal muscles.