The old dog barked loudly at the stranger.

Meaning: This means the dog made a loud noise like a dog in a loud way.

Choice of Words: Bark is a verb that means to make a loud noise like a dog. Loudly is an adverb that means in a loud way. When you put them together, "barked loudly" means to make a loud noise like a dog in a loud way.

Alternative Expressions

Related Expressions