Part of Speech adjective
Origin + Etymology
Early 19th century; Old Norse originally as a noun denoting an ancient Norse warrior who fought with wild or uncontrolled ferocity
  • mad
  • crazy
  • insane
  • hysterical
  • frenzied
  • crazed
  • demented
  • maniacal
  • manic
  • frantic
  • wild
  • sane
  • steady
  • peaceful
out of control with anger or excitement; wild or frenzied
Out of the blue, the dog went berserk.
Usage Over Time

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