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
☆☆ HERO Noun 英雄英雄 anh hùng
☆ HERO; KEY PERSON Noun 主役主人公，主角 vai trò chính, nhân vật chính, nhân vật chủ chốt