From Middle English selfe-willed, selwillyd, equivalent to self- + willed. Compare Middle English onwille, anewil (“selfwilled, stubborn”), from Old English ānwille (literally “one-willed, one's own-willed, self-willed”).
- Obstinate; strong-minded
- He was so self-willed that he refused to do anything that did not grant instant satisfaction.
- Possessing self-will.
- The idea of self-willed machines, which could decide to take over the world, scares all the people smart enough to create such devices.