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
☆ WILLY-NILLY; WITHOUT NOTICE Adverb 不分青红皂白，不由分说 một cách bất ngờ, một cách đột ngột, đột nhiên, thình lình, bỗng dưng