1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)

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ETYMOLOGY

HAN VIET: man diên 蔓延

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆	BEING EPIDEMIC	Noun	蔓延/蔓衍	蔓延	sự lan truyền