The word "fool" means to trick or be dumb about something. A person who easily believes things that aren’t true is a fool.

  • Todd is a fool to believe that Mary would go out with him. ("Fool" in this sentence is a noun.)
  • His friends fooled him into believing Mary liked him. ("Fool" in this sentence is a verb.)
  • He felt foolish after he asked her out and she rejected him. ("Foolish" is an adjective.)
  • Todd foolishly believed his friends were telling him the truth. He should have known better. ("Foolishly" is an adverb.)

This is a good word to learn because it’s often heard in everyday speech:

  • Don’t fool with that. (Don’t touch that.)
  • Kevin got caught fooling around with another woman. (He had a relationship outside his marriage.)
  • Don’t be a fool! (Don’t do that. Don’t think that. Don’t plan for that.)
  • I’m not fooling. / I’m not fooling around. (I’m telling the truth. I’m serious.)
  • Fool me once, shame on you. Fool me twice, shame on me. (It’s a person own fault if he or she is fooled twice.)

Note: Today is April Fool’s Day. On this day, people play tricks on each other and try to fool others into believing something is true.

man with arrow through his head

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April 1, 2013