The word "idiot" is a popular word to use when describing a person as stupid or careless, or when expressing unhappiness with another person’s decision. (This word is a noun).

  • That idiot is driving the wrong way on a one-way street.
  • Rosa says her boss is an idiot.
  • He’s an idiot for leaving his kids in the car on a hot summer day.
  • What kind of an idiot would do that?
  • There’s an idiot down the street who cuts his grass at seven in the morning.
  • Everyone said that Ned was an idiot for what he did.

The word "idiocy" is also a noun. It describes a situation:

  • To continue doing the same thing over and over again, despite the negative consequences, is sheer idiocy.
  • Human beings can’t seem to shake the idiocy of war.

The word "idiotic" is an adjective.

  • That’s an idiotic idea.
  • Whose idiotic decision was this?
  • Some idiotic people are making noise down the street.
  • Sarah came up with an idiotic reason for leaving class early.
  • This movie is totally idiotic.

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 This page was first published on September 9, 2013. It was amended on January 10, 2015.