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
☆☆ GAP; SPACE Noun 缝，缝隙 khoảng cách, khoảng trống
☆☆ CRACK; CREVICE Noun 裂缝，缝隙 khe hở, kẽ hở
☆ CRACK; CREVICE Noun 裂缝，缝隙 khe hở, kẽ hở