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
☆☆☆ UNDERWEAR Noun 内衣 đồ lót, quần áo mặc trong
☆ THERMAL UNDERWEAR Noun 内服内衣 quần áo mặc lót bên trong