Head″strong′ (–strŏng′; 115), a. 1. Not easily restrained; ungovernable; obstinate; stubborn.
Now let the headstrong boy my will control. Dryden.
2. Directed by ungovernable will, or proceeding from obstinacy; as, a headstrong course. Dryden.
Syn. — Violent; obstinate; ungovernable; untractable; stubborn; unruly; venturesome; heady.