Cousin-german refers to a first cousin or a child of one's aunt or uncle who shares the same grandparents. However, there are several synonyms that can also be used to describe a cousin-german. These include first cousin, full cousin, or simply cousin. Other synonyms include blood relative, kin, kinsman, kinswoman, family member, or relative. Additionally, some languages have specific terms for cousin-german, such as "primo" in Italian or "cousin germain" in French. Regardless of the terminology used, a cousin-german is a family member who shares a close familial bond and connection.