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

HAN VIET: độc thư 读书

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆☆☆	READING	Noun	读书	读书	sự đọc sách
☆☆☆	STUDY	Noun	工夫	学习，读书	việc học, sự học