Growl deep.
Meaning: This means to make a low, rumbling sound that is deep and menacing, like an angry dog. For example, The dog growled deeply when the stranger approached.
Choice of Words: Growl is a verb that means to make a low, rumbling sound that dogs and other animals make when they are angry or threatened. Deep is an adjective that means extending far downwards. When you put them together, "growl deep" means to make a low, rumbling sound that is deep and menacing.
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Related Expressions