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
☆ LETHARGY Noun 无气力无力，没力气，没力量 sự yếu đuối, sự không có sinh khí
☆ EFFEMINATE; SPIRITLESS Adjective 懦弱/愞弱 하다 软弱，懦弱 mềm yếu, yếu đuối