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
☆☆ GO IN AND OUT Verb 进进出出 vào ra
☆ KEEP GOING IN AND OUT; KEEP COMING AND GOING; FREQUENT Verb 进进出出 ra vào
☆ KEEP GOING IN AND OUT; KEEP COMING AND GOING; FREQUENT Verb 进进出出 ra vào liên hồi