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
☆☆☆ OFFICE; PLACE OF BUSINESS; WORKPLACE Noun 事务室办公室 văn phòng
☆☆ SECTION CHIEF; HEAD OF A LAB Noun 室长室长，办公室主任 trưởng phòng
☆ GOVERNMENT OFFICE Noun 官公署政府机关，政府办公室 cơ quan nhà nước, cơ quan công