lubriciously

/luːˈbrɪʃəsli/
adverb
  1. In a way that is smooth, slippery, or evasive; often used to describe speech or behavior that is unpleasantly smooth or morally questionable.
    • He lubriciously complimented her, making everyone in the room uncomfortable.
    • The salesman lubriciously avoided giving a straight answer about the product's flaws.
    • The politician lubriciously sidestepped every question during the interview.
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