Adverb
In a foolish manner.
Source: Webster's dictionaryIt is human nature to think wisely and act foolishly. Anatole France
Considering how foolishly people act and how pleasantly they prattle, perhaps it would be better for the world if they talked more and did less. W. Somerset Maugham
Part of the loot went for gambling, part for horses, and part for women. The rest I spent foolishly. George Raft
'tis altogether vain to learn wisdom, and yet live foolishly. Dutch Proverb
It's vain to learn wisdom yet live foolishly. Dutch Proverb
Who lives foolishly as a youth, wails in old age. Sicilian Proverb