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
☆☆ ANSWERING; ANSWER Noun 答辩答辩，回复 câu trả lời, lời đáp
☆ REPLY; ANSWERING BACK Noun 顶嘴，回话 sự đáp lại, sự trả lời lại, sự phản ứng