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.

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆☆	PHENOMENON	Noun	现象	现象	hiện tượng
☆	VOLCANO; VOLCANIC MOUNTAIN	Noun	火山	火山	hiện tượng núi lửa, núi lửa
☆	LOW BIRTH RATE	Noun	低出産	低生育	sự ít sinh con, hiện tượng ít sinh con