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
☆☆☆ PART-TIME JOB; SIDE JOB; STUDENT JOB; MOONLIGHTING Noun Arbeit 打工 việc làm thêm, việc làm ngoài giờ, việc làm bán thời gian
☆☆ MOONLIGHT Noun 月色，月光 ánh trăng