confirm

/kən-ˈfərm/

Middle English, from Anglo-French cunfermer, from Latin confirmare, from com- + firmare to make firm, from firmus firm

verb

  1. to give approval to : ratify

  2. to make firm or firmer : strengthen

  3. to administer the rite of confirmation to

confirm a treaty

confirm corroborate substantiate verify authenticate validate mean to attest to the truth or validity of something. confirm implies the removing of doubts by an authoritative statement or indisputable fact. corroborate suggests the strengthening of what is already partly established.