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 STRONG; BEING POSITIVE; BEING ACTIVE Noun 积极积极 sự tích cực
☆ AFFIRMATION; ACKNOWLEDGEMENT Noun 肯定肯定 sự khẳng định, sự thừa nhận, sự quả quyết, sự tích cực