IPA: /ɪkˈskluːsɪvɪzəm/
KK: /ɪkˈsklusɪˌvɪzəm/
The practice of not allowing certain people or groups to participate or belong, often to maintain a sense of superiority or uniqueness.
The school's exclusivism led to a lack of diversity among its students.
Exclusivism → It is formed from "ex-" (meaning out of or from) and "claudere" (meaning to shut or close), combined with the suffix "-ism" (indicating a practice or philosophy). The term refers to a philosophy or practice that shuts out or excludes certain elements or groups.
Think of 'shutting out' ('claudere') something 'from' ('ex-') — that's why exclusivism means a practice that excludes certain things.
No commonly confused words.