unctuously
🇺🇸
/ˈʌŋktʃuəsli/
🇬🇧
/ˈʌŋktʃuəsli/
in a way that is overly polite or flattering in a fake and disgusting manner
He unctuously complimented her on her new dress, but she could tell he didn't mean it.
他过分恭维她的新裙子,但她能察觉到他的虚情假意。