1 noun acting without thinkingtobainne fem4 c m uluathintinneacht fem c m utaghdaíl femmy stupid impetuosityan spadhar amaideach a bhuail mé, mé féin a bhí róthobannthe impetuosity of youthbaois na hóige2 noun speed and forcefórsa masc4 c m uneart masc1 c m uthe wild impetuosity of the riverfórsa fiáin na habhann