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
☆☆ WITH DIFFICULTY Adverb 勉强，好不容易 một cách khó khăn, một cách chật vật
☆☆ WITH DIFFICULTY Adverb 艰辛 히 好不容易，勉强 một cách chật vật, họa hoằn lắm mới
☆ WITH DIFFICULTY Adverb 好不容易 trong gang tất