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
☆☆☆ THIRTY Numeral 三十 ba mươi
☆☆☆ THIRTY Determiner 三十 ba mươi
☆☆☆ THIRTY Numeral 三十三十 ba mươi
☆☆☆ THIRTY Determiner 三十三十 ba mươi