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
☆☆☆ THANKFUL; GRATEFUL Adjective 感谢，感激 cảm ơn, biết ơn
☆☆ APPRECIATE; THANK Verb 感谢，感激 mang ơn, biết ơn