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
☆☆ FIRE Noun 火灾火灾 hoả hoạn
☆☆ WITH DIFFICULTY Adverb 艰辛 히 好不容易，勉强 một cách chật vật, họa hoằn lắm mới
☆ AT MOST; AT BEST Adverb 才，刚，就，只不过 họa hoằn