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
☆☆☆ FORTY Numeral 四十 bốn mươi
☆☆☆ FORTY Numeral 四十四十 bốn mươi
☆☆☆ FORTY Determiner 四十 bốn mươi
☆☆☆ FORTY Determiner 四十四十 bốn mươi