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

Core Words Familarize yourself with the 'core words'.
Compounds Expand your vocabulary by studying more complex words built by the 'core words'.
Wordsense Learn about the wordsenses of the english term.

ETYMOLOGY

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆	DETECTION; DISCLOSURE; DISCOVERY	Noun	发觉	发现，察觉	sự phát giác, sự phát hiện