Have you considered what it is to undermine the confidence that should subsist between my daughter and myself?
He was taken ill in the night — quite prostrate he was — in consequence of Crab; and after being drugged with black draughts and blue pills, to an extent which Demple (whose father was a doctor) said was enough to undermine a horse’s constitution, received a caning and six chapters of Greek Testament for refusing to confess.
As the receding wave swept back with a hoarse roar, it seemed to scoop out deep caves in the beach, as if its purpose were to undermine the earth.
There are no more uses of "undermine" in the book.
Show samples from other sources
Her father had a way of undermining his sister’s lectures on the innate superiority of any given Finch: he always told his daughter the rest of it, quietly and solemnly, but Jean Louise sometimes thought she detected an unmistakably profane glint in Atticus Finch’s eyes, or was it merely the light hitting his glasses?
Harper Lee -- Go Set a Watchman
He cocked his head, trying on his "I’m so wholesome" routine, but his bloodshot eyes undermined his efforts.