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
☆☆ IRRELEVANT; UNRELATED Adjective 无关 하다 无关，没有关联 vô can, không dính líu, không liên can
☆ CONCERN Verb 关 하다 关于 liên quan đến