Suddenly.
The adverb form of the word "sudden" is suddenly.An example sentence for you is: "Suddenly there was a loud thump from the cellar".
No. Suddenly is an adverb. The adjective form of suddenly is sudden.
Not formally. There is an adverb form, richly. However, colloquially it appears as an adverb in the phrase "strike it rich" (obtain sudden wealth).
No. The word eruption is a noun. The adverb form is "eruptively."
unsudden
The word 'suddenly' is the adverb form of the adjective 'sudden'.An adverb is a word used to modify a verb, an adjective, or another adverb.The noun form of the adjective 'sudden' is suddenness.Examples:The car ahead of me suddenly stopped. (modifies the verb 'stopped')The picnic ended when a sudden storm came through. (adjective)The suddenness of her departure surprised everyone. (noun)
Suddenly.
I think sudden is an adjective, not an adverb. Let me see:A sudden movement caused Clary to advert her eyes.Yes, I think it is an adjective.
Heavily is the adverb form of heavy.Heavily
The adverb form is "noisily."
No, it is an adjective. Anonymously is the adverb form.
The related adverb form is decreasingly. It is the adverb form of the present participle, decreasing. The past participle, decreased, does not form an adverb.