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
☆☆☆ BORED Adjective 无聊 buồn chán, tẻ nhạt
☆☆ DISLIKE; DISGUST; BOREDOM Noun 싫 症厌烦，厌倦 sự chán ghét
☆ BOREDOM Noun 倦怠倦怠，厌倦，腻烦 sự mệt mỏi, sự chán ngán, nỗi buồn chán
☆ BORED Adjective 无聊 하다 无聊 buồn tẻ, tẻ nhạt