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
☆ UNAVOIDABLY; INEVITABLY Adverb 不得已不得已 một cách bất đắc dĩ
☆ BEING COMPELLED TO; BEING FORCED TO Adjective 不得已，不得不，勉强 đành phải, không còn cách nào khác