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'.
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ETYMOLOGY

KOREAN 3.0 Eng Wordtype Etym. Gb Vie
☆☆ BEING PERIODIC Noun 定期定期 định kỳ
☆☆ BEING PERIODIC Noun 定期的定期的 tính định kì
☆☆ PERIODIC Determiner 定期的定期的 có tính chất định kì
☆ PERIODIC Determiner 时代的时代的 mang tính thời đại