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
☆☆ EXTREMELY; UTTERLY Adverb 至极 히 十分，极其 cực kì, vô cùng
☆☆ GREATLY; EXTREMELY Adverb 极 히 极其 cực kì