late 14c., headling, also headlings, "headfirst (downward); headlong (forward); without thinking, hastily," from hed "head" (see head (n.)) + adverbial suffix -ling. Altered by c. 1400 to conform with sidelong, etc. Its true companions are now mostly obsolete: darkling, backling, flatling, etc.
例文
1. She missed her footing and fell headlong down the stairs.
彼女は足を踏み外して、頭を下に向けて階段を落ちた。
2.The country,they say,will inevitably now plunge headlong into decadence.
彼らは、今や国全体が不況に陥ることは避けられないと言っている。
3.The army was in headlong flight.
部隊は当時、慌てて逃げていた。
4.She fell headlong into the icy pool.
彼女はネギを逆さまに植えて冷たい池に落ちた。
5.The little boy fell headlong down the flight of stairs.