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
☆☆☆ TEACHING; INSTRUCTION Noun 敎授教授，教学，讲授 việc giảng dạy
☆☆ LECTURE Noun 讲义讲课，授课，讲授 việc giảng dạy