cliquish

那个新来的学生觉得班上的小团体排外，很难融入。

The new student found the class ___cliquish and hard to break into.

这家公司的研发部门以排外著称，对外人很不友好。

The R&D department is known for being ___cliquish toward outsiders.

她受不了那个排外的小圈子，最终退出了俱乐部。

She couldn't stand the ___cliquish circle and eventually left the club.