headlong

Adjective

• with the head foremost
  • a headfirst plunge down the stairs
    
  • a headlong dive into the pool
    

• excessively quick
  • made a hasty exit
    
  • a headlong rush to sell
    

Adverb

• in a hasty and foolhardy manner
  • he fell headlong in love with his cousin
    

• at breakneck speed
  • burst headlong through the gate
    

• with the head foremost
  • the runner slid headlong into third base
    

Related words

• Synonyms: 
  headfirst , hasty , rashly , precipitately