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
☆☆ PURCHASE; BUYING Noun 购入购入，购买，购置 sự mua vào, sự thu mua
☆☆ BUY UP; LAY IN Verb 买进，购入 mua vào