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
☆☆ COMMUNICATION; CORRESPONDENCE Noun 通信通信，通讯 viễn thông
☆ RESPONDENT Noun 应答者回答者 người ứng đáp, người trả lời
☆ RESPOND; ANSWER; ACCEPT Verb 应 하다 回应，响应 đáp ứng