The traditional customs and moral standards of a particular group or society.
From Latin 'mores' meaning customs or habits (plural of 'mos'). The word entered English in the 19th century from academic writing about society and culture.
Mores is one of the few English words we pronounce exactly like its Latin plural (not mor-es, but MOR-ayz), because it came directly from Latin scholarship into English where it stayed frozen in academic usage.
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