General Peckem roused himself after a moment with an unctuous and benignant smile.
The chaplain bent his face away with burning shame and allowed himself to be led into the rear of a staff car and seated between the fat colonel with the large, pink face and the skinny, unctuous, despondent major.
There are no more uses of "unctuous" in the book.
Show samples from other sources
But she kept her attention on me, unctuously gesturing, and even as he leaned and bucked into her she held out her open hand to me, as if I should take it when I crept my way inside.
Chang-rae Lee -- A Gesture Life
He made no effort to be civil, or his normal unctuous, ingratiating self.