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
☆☆ GUARANTEE Noun 保藏保障 sự bảo đảm
☆☆ SECURING; OBTAINING; RESERVE Noun 确保确保，获取，获得 sự đảm bảo, sự bảo đảm