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

HAN VIET: vũ mao 羽毛

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆☆☆	BADMINTON	Noun	badminton	羽毛球	cầu lông
☆	FEATHER	Noun		羽毛	lông vũ