1
as in lunatic
a person who lacks good sense or judgment
only a fool would attempt to climb that mountain unprepared
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2
as in clown
a person formerly kept in a royal or noble household to amuse with jests and pranks
a king's fool could get away with saying things that others in the palace couldn't
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3
as in sucker
a person with a strong and habitual liking for something
I'm a fool for ice cream
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4
as in psychopath
a person having or showing a severely disordered or abnormal state of mind
he got out of serving in the army by successfully pretending to be a fool
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as in foolish
showing or marked by a lack of good sense or judgment
he's always got some fool plan or other
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1
as in to deceive
to cause to believe what is untrue
I fooled him into thinking that we were driving to the store, not to his surprise birthday party
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2
as in to joke
to make jokes
an edgy comedian fooling with an appreciative college audience
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Merriam-Webster unabridged
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