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
☆☆ BEING FULL; BEING OFFICIAL Noun 正式正式 chính thức
☆☆ BEING OFFICIAL; BEING STATE Noun 公式正式，官方 chính thức
☆ BEING OFF; BEING CLOSED Noun 休务休息，休业，暂停办公 sự nghỉ làm
☆ BEING OFFICIAL Noun 公式的正式的，例行的 tính chính thức
☆ BEING OFFICIAL Noun 事务的事务性的，文书上的 tính văn phòng