cliquiest
/ˈkliːkiɪst/
adjective
- Most characteristic of or favoring a small, exclusive group of people who do not readily allow others to join.
- The cliquiest department in the company rarely shared information with other teams.
- That was the cliquiest high school I've ever seen, with separate tables for every sport and club.
- Her cliquiest behavior made the new students feel unwelcome at the party.
Antonyms