/un'deuhr with hohld", -widh-/, v., underwithheld, underwithholding.
v.t.
1. to withhold too little.
2. to deduct (withholding tax) less than the necessary amount.
v.i.
3. to withhold oneself too little.
4. to deduct less withholding tax than necessary.
[UNDER- + WITHHOLD]
Useful english dictionary. 2012.