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
☆☆☆ TENNIS COURT Noun tennis 场网球场 sân quần vợt
☆☆☆ TABLE TENNIS; PING-PONG Noun 卓球乒乓球 bóng bàn
☆☆☆ TENNIS Noun tennis 网球 ten-nít, quần vợt