Bon

google

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from Japanese.

wiktionary

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Borrowed from Tibetan བོན(bon).

etymonline

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bon (adj.)

French, literally "good" (adj.), from Latin bonus "good" (see bonus). It has crossed the Channel in phrases such as bon appétit, literally "good appetite" (1860); bon-ton "good style" (1744); bon mot (1735), etc. Compare boon, bonhomie.