Meaning of underwithhold

un•der•with•hold

Pronunciation: (un"dur-with-hōld', -wi-), [key]
— v., -held, -hold•ing.
—v.t.
  1. to withhold too little.
  2. to deduct (withholding tax) less than the necessary amount.
—v.i.
  1. to withhold oneself too little.
  2. to deduct less withholding tax than necessary.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.