Questions about example sentences with, and the definition and usage of "Watchdog"

A: I'm sorry...I'm a beginner in Vietnamese. Hope this is helpful.

Một được giữ để bảo vệ tài sản tư nhân.
a dog kept to guard private property.

Duy trì sự giám sát (một người, hoạt động hoặc tình huống) để đảm bảo họ làm đúng
Maintain supervision (a person, activity, or situation) to ensure they do the right thing

ai đó hoặc điều gì đó cảnh báo người khác về nguy hiểm
someone or something that warns others of danger

A: A watchdog is a dog that is trained to watch a place, like someone’s house. They start barking if there is an intruder or sometimes are trained to attack. It is similar to a guard dog.
we use “watchdog” as an expression sometimes to mean someone who is on high alert for anything strange or suspicious.
I hope that helps!

A: it depends on the context. it can be a dog who guards a house or a business. Or, it can be a person, or an organization that closely monitors the rules & laws of the government, and will alert people to unfair laws being changed, and even file lawsuits in Federal courts to prevent the government, or other corporation from doing something that is bad for the public, or the environment, or both.

A: @gguozhou:watchdog means your alert a security or entourage that has you back 24 hr watch

A: I would say-

Watchdog
pet dog
pet cat or house cat

I don't know why we don't say "house dog" but we don't! :)