adjective 1.determined to have one's own way; willful; stubborn; obstinate: a headstrong young man.
2.proceeding from or exhibiting willfulness: a headstrong course.
Origin: 1350–1400; Middle English heedstronge. See
head,
strong Related forms head·strong·ly, adverb
head·strong·ness, noun
Antonyms
1. tractable, docile.