Englishverify
verb
reports of the massacre could not be verified:
substantiate, confirm, prove, show to be true, corroborate, back up, support, uphold, evidence, establish, demonstrate, demonstrate the truth of, show, show beyond doubt, attest to, testify to, validate, authenticate, endorse, certify, accredit, ratify, warrant, vouch for, bear out, bear witness to, give credence to, give force to, give/lend weight to, justify, vindicate;
make sure, make certain, check;
informal pin down;
British, informal suss out.
▷antonyms refute.
verify Oxford Dictionary of English