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definitions

underwithhold

[uhn-der-with-hohld, -with-]
verb (used with object), un·der·with·held, un·der·with·hold·ing.
  1. to withhold too little.
  2. to deduct (withholding tax) less than the necessary amount.
verb (used without object), un·der·with·held, un·der·with·hold·ing.
  1. to withhold oneself too little.
  2. to deduct less withholding tax than necessary.

Origin of underwithhold

under- + withhold
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018