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Etymology
🇰🇲.

Noun

 * 1)  the 𖿱, a small diacritic (or signifier) placed to the right of a phonogram in a Nôm text, chiefly to indicate that this character should not be read with its Sino-Vietnamese value, and can also function as iteration mark; like other diacritical marks/signifiers in other Sino-Xenic languages, such as Japanese, its pre-modern usage was very inconsistent