The Collaborative International Dictionary of English v.0.48:
Precipitately \Pre*cip"i*tate*ly\, adv. In a precipitate manner; headlong; hastily; rashly. --Swift. [1913 Webster]WordNet (r) 3.0 (2006):
precipitately adv 1: at breakneck speed; "burst headlong through the gate" [syn: headlong, precipitately]