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
☆☆ OPPORTUNITY; CHANCE Noun 契机契机 bước ngoặt, dấu mốc, mốc
☆ TURNING POINT Noun 转机转机 bước ngoặt
☆ TURNING POINT Noun 转换点转换点，转折点 bước ngoặt