undersell - definition and synonyms

verb [transitive] 

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/ˌʌndə(r)ˈsel/
present tense
I/you/we/theyundersell
he/she/itundersells
present participleunderselling
past tenseundersold
past participleundersold
  1. 1
    to think or say that someone or something is less important, valuable, effective etc than they really are
    undersell yourself:

    Many women have a tendency to undersell themselves in job interviews.

  2. 2
    to sell something at a cheaper price than someone else