[head.long] adv [ME hedlong, alter. of hedling, fr. hed head] (14c) 1: headfirst
2: without deliberation: recklessly
3: without pause or delay
[2]head.long adj (ca. 1550) 1 archaic: steep, precipitous
2: lacking in calmness or restraint: precipitate "a ~ torrent of emotion"
3: plunging headforemost syn see precipitate