To say “dear friend” in Spanish, you would say “querido amigo” if you’re addressing a male friend, or “querida amiga” if you’re addressing a female friend.
The word “querido” translates to “dear” and is used to express affection or closeness. It is a common way to address someone you care about, whether in writing or in conversation. The word “amigo” means “friend” and it’s gender-specific; “amigo” for males and “amiga” for females. Therefore, the context in which you say it will determine which form you should use.