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
☆☆☆ DOUBLE; TWO TIMES Noun 倍倍 gấp nhiều lần
☆☆ ALL THE MORE; EVEN MORE Adverb 更加，倍加，愈益 càng hơn nữa