approve, endorse, sanction, accredit, certify mean to have or express a favorable opinion of.
approve often implies no more than this but may suggest considerable esteem or admiration. the parents approve of the marriage
endorse suggests an explicit statement of support. publicly endorsed her for Senator
sanction implies both approval and authorization. the President sanctioned covert operations
accredit and certify usually imply official endorsement attesting to conformity to set standards. the board voted to accredit - the college must be certified to teach
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Some are wise, some are otherwise, and I have my moments.