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
☆ THE ONE; CULPRIT Noun 张本人元凶，罪魁祸首 thủ phạm chính, nhân vật chính gây ra
☆ MAIN PERPETRATOR Noun 主犯主犯，首犯 thủ phạm chính