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
☆☆ ELDERLY OR INFIRM PEOPLE Noun 老弱者老弱者 người già yếu
☆ SINGLE ELDERLY PERSON HOUSEHOLD Noun 独居老人独居老人，空巢老人 ?