HEADSTRONG
froward, headstrong, self-willed, willful, wilful
(adjective) habitually disposed to disobedience and opposition
Source: WordNet® 3.1
Etymology
Adjective
headstrong (comparative more headstrong, superlative most headstrong)
Determined to do as one pleases, and not as others want.
Synonyms
• See also obstinate
Source: Wiktionary
Head"strong`, a.
1. Not easily restrained; ungovernable; obstinate; stubborn.
Not let headstrong boy my will control. Dryden.
2. Directed by ungovernable will, or proceeding from obstinacy.
Dryden.
Syn.
– Violent; obstinate; ungovernable; unratable; stubborn; unruly;
venturesome; heady.
Source: Webster’s Unabridged Dictionary 1913 Edition