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authenticate

au·then·ti·cate

authenticate

 
 
pronunciation:
aw then tih keIt
part of speech: transitive verb
inflections: authenticated, authenticates, authenticating
definition: to prove the genuineness, reality, or validity of.
The specialist authenticated the letters as being written by Abraham Lincoln.
synonyms:
validate, verify
antonyms:
impugn
similar words:
attest, certify, confirm, corroborate, document, establish, evidence, prove, substantiate
derivation: authentication (n.)