Etymonline - Online Etymology Dictionary The online etymology dictionary (etymonline) is the internet's go-to source for quick and reliable accounts of the origin and history of English words, phrases, and idioms. It is professional enough to satisfy academic standards, but accessible enough to b www.etymonline.com cardio- "심장에 관한"의 뜻이 있는 단어형성요소로 라틴화된 그리스어 kardia "심장"의 기원인 인도유럽 공통조어어근(PIE) kerd-..