precipitous precipitous /prɪˈsɪpɪtəs/

adjective

1. Extremely steep  ( abrupt , precipitous , sharp )
   extremely steep
    An abrupt canyon
   an abrupt canyon
    The precipitous rapids of the upper river
   the precipitous rapids of the upper river
    The precipitous hills of Chinese paintings
   the precipitous hills of Chinese paintings
    A sharp drop
   a sharp drop
   
2. Done with very great haste and without due deliberation  ( hasty , overhasty , precipitant , precipitate , precipitous )
   done with very great haste and without due deliberation
    Hasty marriage seldom proveth well
   hasty marriage seldom proveth well
    Hasty makeshifts take the place of planning
   hasty makeshifts take the place of planning
    Rejected what was regarded as an overhasty plan for reconversion
   rejected what was regarded as an overhasty plan for reconversion
    Wondered whether they had been rather precipitate in deposing the king
   wondered whether they had been rather precipitate in deposing the king