cancel_out
1. [ verb ] wipe out the effect of something
Synonyms: wipe_out
Examples:

"The new tax effectively cancels out my raise" "The `A' will cancel out the `C' on your record"

Related terms: eliminate destruction
Similar spelling:   cancellous
  cancellate
  cancellated
  cancellation
  chancellor
  Cangelosi
  cancelled
  chancel