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
☆☆ FIELD; SPHERE Noun 分野领域，方面 lĩnh vực
☆☆ ATMOSPHERE Noun 大气大气，空气 bầu khí quyển
☆ SPHERE Noun 球球 vật hình cầu, hình cầu