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
☆☆ BE ON TIME Verb 到，到达，对 đến, tới
☆☆ VERY DARK; PITCH-DARK Adjective 漆黑，黑洞洞 tối đen, tối tăm