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
☆☆☆ MIDDLE SCHOOL Noun 中学校初中 trường trung học cơ sở
☆☆☆ MIDDLE SCHOOL STUDENT Noun 中学生初中生 học sinh trung học cơ sở