mongrel

This word is most commonly used for a dog of mixed breeding, not a purebred with a recorded family line. It often brings to mind a friendly, ordinary dog made up of several breeds. In older or offensive use, it was also used as an insult for a person of mixed descent or for someone seen as lowborn or illegitimate. That human use is insulting and should be avoided. Today, the word is mainly used for mixed-breed dogs, sometimes with affection.

The word "mongrel" first referred to a dog of mixed breed, one whose family line is not purebred or formally recorded. It usually suggests an ordinary mixed-breed dog rather than a dog from a single known breed. In everyday modern English, this is still the main meaning, and people may use it neutrally or even warmly when talking about a pet or rescue dog.

The word also has a harsh history. It was used as a derogatory term for a person thought to be of mixed racial background, low birth, or illegitimate birth. That use is offensive and should be avoided. Because of that history, the word can sound unpleasant in some contexts even when it is used about animals.

Sometimes the word is also used more broadly for something made from mixed or unlike parts, especially in a way the speaker does not fully approve of. Even so, the dog meaning is the one most learners are most likely to meet. In short, "mongrel" usually means a mixed-breed dog, but it also has an offensive historical use for people, so it needs care.