D defs.my
Entry 2 senses Webster, 1913

Headstrong

/(-strŏng`; 115)/ · Head·strong · IPA /hˈɛdstrˌɔŋ/
01 a. Not easily restrained; ungovernable; obstinate; stubborn.
  1. 1.
    Not easily restrained; ungovernable; obstinate; stubborn.
    “Now let the headstrong boy my will control.” Dryden.
  2. 2.
    Directed by ungovernable will, or proceeding from obstinacy; as, a headstrong course.