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
☆☆ BEING SELFISH; BEING EGOISTIC; BEING EGOCENTRIC Noun 利己的利己的 sự ích kỷ, tính ích kỷ
☆☆ SELFISH; SELF-CENTERED; EGOTISTIC Determiner 利己的利己的 có tính ích kỷ
☆ SELFISHNESS; EGOISTIC MIND; SELF-CENTERED MIND Noun 利己心利己心 lòng vị kỷ, lòng ích kỷ
☆ FREE RIDER; SELFISH PERSON Noun 厚脸皮，厚颜无耻之人 kẻ vô liêm sỉ