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
☆☆ BEING RATIONAL; BEING REASONABLE Noun 合理的合理的 tính hợp lý
☆ BEING RATIONAL; BEING REASONABLE Noun 理性的理性的 tính duy lý, tính lý trí