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
☆☆☆ NINE Numeral 九九 số chín
☆☆ HEADQUARTERS Noun 本部本部，总部 trụ sở chính
☆ HEADQUARTERS Noun 本社总公司，总社 trụ sở chính