headlong

/ˈhɛdˌlɔŋ/
adverb
  1. With the head leading; in a rushing or reckless manner.
    • The child ran headlong into the pile of leaves without looking.
    • She dove headlong into the new project without checking the budget first.
    • The horse bolted headlong down the trail, ignoring its rider's commands.
Antonyms
adjective
  1. Done or acting with reckless haste; without careful thought.
    • His headlong rush to finish the report caused several mistakes.
    • It was a headlong decision that they regretted almost immediately.
    • The company's headlong expansion led to financial trouble.
Synonyms
What does "headlong" mean? | whatsthatwordmean | whatsthatwordmean