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Yes rotten as an adverb means to an extreme degree.
Yes, supremely is an adverb. It means immensely, or to a great or extraordinary degree.
Yes, extensively is an adverb. It means to a wide or comprehensive degree.
Yes, decidely is an adverb. It modifies an adjective and means to a definite extent or degree.
Yes. It means extremely or to a great degree.
The word how is an adverb. It means to what degree.
No, "greatly" is not a preposition. It is an adverb that is used to describe to what extent or degree an action is done.
"Little" can function as both an adverb and an adjective. As an adverb, it modifies verbs, adjectives, and other adverbs to indicate a small degree or extent. As an adjective, it describes nouns to indicate size, quantity, or degree.
Yes, it is, when it means actually, in truth. The colloquial use of "really" to mean "very" would be an adverb of degree.
No. "Quadratic" means degree of 2.
The definition of the word depends on how it is used. As a noun, it means the identity of something, and as an adverb it means to what degree or extent.
The word partially is an adverb. It means to do something to a partial degree.