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
☆ LECTURE; COURSE Noun 讲座讲座 buổi thuyết giảng
☆ LECTURE Noun 讲演演讲，讲演，讲座 sự diễn thuyết, sự thuyết giảng
☆ SPECIAL LECTURE Noun 特讲特讲，讲座 bài giảng đặc biệt