/ˈɑːrbɪtreri/ ADJ If you describe an action, rule, or decision as arbitrary, you think that it is not based on any principle, plan, or system. It often seems unfair because of this. 随意的 Arbitrary arrests and detention without trial were common. 不经审讯随意扣押是常有的。 The choice of players for the team seemed completely arbitrary. 这个队的队员完全是随意选定的。副词+形容词