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
☆☆☆ THE DAY BEFORE YESTERDAY Noun 前天 hôm kia
☆☆☆ THE DAY BEFORE YESTERDAY Adverb 前天 ngày hôm kia
☆☆ THE DAY BEFORE YESTERDAY Noun 前天 ngày hôm kia
☆☆ THE DAY BEFORE YESTERDAY Adverb 前天 ngày hôm kia