unctuous
UHNGK-choo-uhs, adjective
Excessively smooth and flattering; oily.
“The unctuous maître d' upgraded them straight past sincerity.”
Difficulty: advanced. One of 440 entries written and checked by hand.
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More advanced words
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- apocryphal Of doubtful authenticity, although widely circulated as true.
Nearby: ultracrepidarian uxorious All 440 words