ar·bi·tra·ry /ˈɑːbətrəri, -tri $ ˈɑːrbətreri/ ●○○ AWL adjectiveadj CHANCE/BY CHANCEdecided or arranged without any reason or plan, often unfairly 任意的;专横的,武断的 an arbitrary decision 武断的决定
the arbitrary arrests of political opponents 对政敌的任意逮捕
—arbitrariness noun [uncountableU]
—arbitrarily /ˈɑːbətrərəli $ ˌɑːrbəˈtrerəli/ adverbadv an arbitrarily chosen number 任选的一个数字