← BackshareGuessungenuine/ʌnˈdʒɛnjuɪn/adjectiveNot genuine; false, fake, or insincere.Her ungenuine smile made everyone suspicious of her motives.He gave an ungenuine apology, just to avoid punishment.The painting was discovered to be ungenuine, a clever forgery.SynonymsinsincerefalsefakeAntonymsauthenticgenuine