Bris

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Hebrew bĕrīṯ, short for bĕrīṯ milah ‘covenant of circumcision’.

wiktionary

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Borrowed from Yiddish ברית‎ (bris), from Hebrew בְּרִית‎ (bərîṯ, “covenant”).

etymonline

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bris (n.)

Yiddish word for the circumcision ceremony, 1956, from bris milah, Ashkenazi pronunciation of brit milah "covenant of circumcision."