"precipitous" in the adjective sense
1. hasty, overhasty, precipitate, precipitant, precipitous
done with very great haste and without due deliberation
"hasty marriage seldom proveth well"- Shakespeare
"hasty makeshifts take the place of planning"- Arthur Geddes
"rejected what was regarded as an overhasty plan for reconversion"
"wondered whether they had been rather precipitate in deposing the king"
2. abrupt, precipitous, sharp
extremely steep
"an abrupt canyon"
"the precipitous rapids of the upper river"
"the precipitous hills of Chinese paintings"
"a sharp drop"
Source: WordNet® (An amazing lexical database of English)
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