adjective

crazy

Very foolish, wild, or unreasonable; informally, extremely enthusiastic.

Walking across that frozen lake without checking the ice is crazy.

Etymology

Middle English crasen meant to break or damage. Crazy moved from physical damage to disturbed or unreasonable behavior, then broadened into informal descriptions of wildness or intense enthusiasm.

More examples

  • The crowd goes crazy when the band walks onstage.
  • Maya is crazy about old detective movies.
  • That price is crazy for such a small apartment.

Forms

crazy · crazier · craziest

craziness noun — Wild, foolish, or unreasonable behavior.

crazily adverb — In a wild or unreasonable way.

Similar words

foolish
Focuses on poor judgment rather than wild behavior or enthusiasm.
wild
Emphasizes uncontrolled energy rather than foolishness or strong enthusiasm.
enthusiastic
Expresses strong interest without suggesting foolish or unreasonable behavior.