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
☆☆ UP AND DOWN Noun 上下 trên dưới
☆☆ GO UP AND DOWN; ASCEND AND DESCEND Verb 上上下下 đi lên đi xuống, leo lên leo xuống
☆ MOVE UP AND DOWN; RAISE AND LOWER Verb 耸动，抖动 đi lên đi xuống, đưa lên đưa xuống
☆ MOVE UP AND DOWN; RAISE AND LOWER Verb 耸动 đưa lên hạ xuống