The suffix that should be added to this root word match the definition linguist?

The suffix you should add to the root word "match" to make it mean "linguist" is "-ologist".

This gives you the word "matchologist", which is a made-up word meaning "a person who studies or is an expert in the art of matching."

However, it's important to note that "matchologist" is not a real word in the English language. It's a humorous example of how we can use suffixes to create new words.