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
☆☆☆ SPECIALLY; PARTICULARLY; ESPECIALLY Adverb 特别 히 特别，特意 một cách đặc biệt
☆☆☆ SPECIAL Adjective 特别 하다 特别，特殊 đặc biệt
☆ BEING SPECIAL Noun 特别特别 sự đặc biệt