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
☆☆☆ PACKAGE; PARCEL Noun 小包包裹 bưu phẩm, bưu kiện
☆☆ MAIL Noun 邮便邮递，邮寄 sự chuyển nhận bưu phẩm
☆☆ MAIL Noun 邮便物邮件，信件 bưu phẩm