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
☆☆ TEACHING MATERIAL; TEACHING AID Noun 敎材教材 giáo trình
☆ TEACHING PROFESSION Noun 敎职教职，教育工作 nghề giáo
☆ TEACHING; LESSON Noun 教诲，教导，指教 sự chỉ dạy, sự dạy bảo
☆ COACHING; TEACHING Noun coach 教练，训练 sự chỉ dạy