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
☆ ACTIVITY; PERFORMANCE; ACTIVE ROLE Noun 活跃活跃，活动，驰骋 sự hoạt động tích cực, sự hoạt động sôi động