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'.
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ETYMOLOGY

KOREAN 3.0 Eng Wordtype Etym. Gb Vie
☆☆☆ CHANCE; OPPORTUNITY Noun 机会机会，机遇，时机 cơ hội
☆☆ OPPORTUNITY; CHANCE Noun 契机契机 bước ngoặt, dấu mốc, mốc
☆ OPPORTUNITY; CHANCE; TIME Noun 时机时机，机会 thời khắc, thời cơ