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
☆☆ HARDEN; BECOME SOLID Verb 变硬，变坚硬 trở nên đông, trở nên cứng
☆☆ HARDEN; BECOME SOLID Verb 变硬 đông, cứng
☆ HARDEN; FIRM Verb 压实，打夯 nhận xuống, ép xuống
☆ HARDEN; MAKE HARD Verb 变硬 làm cho đông, làm cho cứng