clannish /ˈklænɪʃ/ adjective Learner's definition of CLANNISH
[more clannish; most clannish] often disapproving
: not showing interest in people who are not part of your group or who are not similar to you小集团的;排他的 -
a clannish fishing community排外的垂钓团体
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The college faculty can be pretty clannish, so it's difficult to be an outsider there.那所院校的教师可能非常抱团,外来人在那里处境困难。