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
☆☆☆	PAST; ANCIENT TIMES	Noun		古，古代	ngày xưa, thuở xa xưa
☆☆	ANCIENT TIMES	Noun	古代	古代	thời kỳ cổ đại
☆☆	CLASSICAL CHINESE	Noun	汉文	古汉语，古代汉语，文言文	hán văn