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
☆☆☆ SUMMER Noun 夏，夏天，夏季 mùa hè
☆☆ SUMMER; SUMMER SEASON Noun 夏季 mùa hè
☆☆ MIDSUMMER; MIDDLE OF SUMMER; THE HEIGHT OF SUMMER Noun 盛夏，酷暑 giữa mùa hè
☆☆ THIS SUMMER Noun 今夏 mùa hè này, mùa hè năm nay