Headstrong

прилагательное настойчивый, своевольный, упрямый, упорный Синоним(ы): stubborn

Большой англо-русский словарь

Headstrong

adjective 1. not easily restrained; impatient of control, advice, or suggestions Example: a headstrong businessman 2. directed by ungovernable will Example: violent headstrong actions Synonyms: see unruly

Merriam-Webster's Collegiate Dictionary