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
☆☆ PROFESSIONAL TRAVELER Noun 旅行家旅行家 nhà du lịch, nhà lữ hành
☆☆ PROFESSIONAL; SPECIALIST Noun ←professional 专业人员，专家 người chuyên nghiệp, nhà chuyên môn, chuyên gia
☆☆ BEING PROFESSIONAL Noun 专门的/颛门的专业的，专门的 tính chuyên môn
☆☆ PROFESSIONAL Determiner 专门的/颛门的专业的，专门的 mang tính chuyên môn
☆ INEXPERIENCED; UNSKILLED; UNPROFESSIONAL Adjective 未熟 하다 不熟练，不自如，生疏 chưa thành thạo, thiếu kinh nghiệm