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Pronunciation of 

unctuous

view main entry for unctuousadjective formal  /ˈʌŋktʃʊəs/
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derived words

unctuously

adverb

unctuousness

noun [uncountable]
unctuousness noun [uncountable]Cheating, dishonest and insincere behaviour: dishonesty, deceit, corruption, deception, smoke and mirrors, foul play, misconduct, guile, duplicity, double-dealing

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