to confirm by expressing consent, approval, or formal sanction

to ratify a constitutional amendment.

to confirm (something done or arranged by an agent or by representatives) by such action.

verb

deny , disaffirm , disagree , renounce , revoke , veto

verb

accredit , approve , authenticate , bear out , bind , bless , certify , commission , confirm , consent , corroborate , endorse , establish , give stamp of approval , go for * , license , okay * , rubber stamp * , sanction , sign , substantiate , uphold , validate , adopt , affirm , pass , authorize , seal , verify