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
☆☆☆ TIREDNESS; EXHAUSTION; FATIGUE Noun 疲困疲惫，疲劳，疲倦 sự mệt mỏi, sự mệt nhọc
☆☆ TIREDNESS; EXHAUSTION; FATIGUE Noun 疲劳疲劳，疲倦，疲乏，劳累 sự mệt mỏi
☆ BEING SPIRITLESS; BEING DEJECTED; BEING ABSENT-MINDED; BEING DAZED Noun 虚脱虚脱 sự mệt mỏi, sự đuối sức
☆ BOREDOM Noun 倦怠倦怠，厌倦，腻烦 sự mệt mỏi, sự chán ngán, nỗi buồn chán