Origin: Latin suffix -ate
Authenticate has 3 different meanings across 1 category:
establish the authenticity of something
"The museum guard had to authenticate the painting before allowing it into the exhibition hall."
To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.
"The notary public will authenticate your signed deed before you can officially transfer the property title."
Synonym of authentic.
"The museum refused to authenticate the painting as a genuine Rembrandt before adding it to their collection."