Referring to someone who is a purebred or has not interbred with other breeds or ethnicities.

Used informally to denote someone who is a true member of a family or group.

परिवार का सच्चा सदस्य

English Usage: You are a full blood of this family, no doubts about it.

Hindi Usage: आप इस परिवार के सच्चे सदस्य हैं, इसमें कोई संदेह नहीं।