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Unctuous

usgb/ˈʌŋktʃuəs/Volume
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LampPro Tip 1/3
InsincerityPlay
Unctuous behavior often implies dishonesty or pretending to be nice. SlideHis unctuous compliments felt empty and deceitful.
LampPro Tip 2/3
Hidden MotivesPlay
The word is used when someone is overly friendly for self-serving reasons. SlideThe salesman's unctuous demeanor made me skeptical.
LampPro Tip 3/3
Positive to NegativePlay
'Unctuous' often starts with a positive impression then shifts to a negative feeling. SlideI was put off by his unctuous charm; it seemed fake.