hasty in WordNet English dictionary

1. excessively quick
   "made a hasty exit"; "a headlong rush to sell"
   hasty  headlong 
   
2. 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"
   hasty  overhasty  precipitate  precipitant  precipitous