goolishly
The suffix for "foolishly" is "-ly."
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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Foolishly
A Treasury of Foolishly Forgotten Americans was created on 2008-03-25.
giggle
Wisely
The adverb is foolishly and it modifies the verb believed.