self willed
[adjective]
Synonyms: obstinate, bullheaded, headstrong, intractable, mulish, pertinacious, pigheaded, refractory, stiff-necked, stubborn

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Contrasted words: weak, weak-willed, wishy-washy, spineless

[TahlilGaran] English Synonym Dictionary ▲

ˌself-ˈwilled adjective
very determined to do what you want, whatever other people think – used to show disapproval Synonym : obstinate:
a wild and self-willed child
—self-will noun [uncountable]

[TahlilGaran] Dictionary of Contemporary English ▲