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
☆☆☆ UGLY-LOOKING; HOMELY Verb 丑，难看 xấu xí, khó nhìn
☆☆ UGLY; BAD-LOOKING; PLAIN Verb 丑陋，难看 xấu xí, thô thiển