The suffix for "foolishly" is "-ly."
The word "foolishly" is an adverb. It modifies a verb, adjective, or another adverb by providing information on how an action is done.
The verb that means to laugh foolishly or nervously is "titter."
The suffix for undo is to not do.
the suffix is on
The suffix is -er, meaning "one who campaigns."
Foolishly is an adverb, yes.Some example sentences are:Foolishly, I rejected the offer.He foolishly sold the antique for less than its value.
I foolishly believed my brother when he told me it was a school day when it was really Saturday.
A Treasury of Foolishly Forgotten Americans has 272 pages.
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A Treasury of Foolishly Forgotten Americans was created on 2008-03-25.
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Wisely
The adverb is foolishly and it modifies the verb believed.