Incorrect spelling, explanation: this form is the wrong one because to create an adverb we need to add the suffix -ly to an adjective. In this case, the adjective is sudden, so the correct form of adverb is suddenly, not suddendly. D before -ly is unnecessary, so the correct form is suddenly.
Correct spelling, explanation: suddenly is an adverb made from the adjective sudden. To create an adverb we need to add the suffix -ly to an adjective. Therefore sudden plus -ly is suddenly not suddendly. This is due to the rule we use to create adverbs.
Definition of suddenly:
adverb, all of the sudden, very quickly
Suddenly, he stood up and left without a word.
I’m sorry, I suddenly felt really bad.
Incorrect spelling
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No, it’s not.
But is suddenDly used somewhere as the correct form?
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