a.

1. 乖张易怒的；性情暴戾的
   You have to learn to deal with fractious children if you want to be a teacher.

   如果你想为人师表的话，你必须学会如何对付性情乖张的小孩。

2. 难以对待的；难以捉摸的
   Trump can be very fractious when it comes to international negotiations.

   在国际谈判方面，特朗普可以说是非常难以捉摸的。

adj.

1. easily irritated.
2. difficult to control.