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
☆☆☆ NEED; NECESSITY; REQUIREMENT Noun 必要必要，需要 sự tất yếu
☆☆ NECESSITY; NEED Noun 必要性必要性 tính tất yếu
☆ DAILY NECESSITY Noun 生必品生活必需品 đồ dùng thiết yếu