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
☆ POP-POP Adverb 噼啪，哗啦 tung tóe
☆ IN CROWDS; RUSHINGLY Adverb 呼啦，呼啦啦 một cách dồn dập, một cách lũ lượt, ùn ùn