The Collaborative International Dictionary of English v.0.48:
Self-willed \Self`-willed"\, a. Governed by one's own will; not yielding to the wishes of others; obstinate. [1913 Webster]WordNet (r) 3.0 (2006):
self-willed adj 1: habitually disposed to disobedience and opposition [syn: froward, headstrong, self-willed, willful, wilful]