His snide remarks undermined the point the speaker was trying to make.
As I was getting ready to make good my escape, a patrolling guard undermined my plan to make good on it.
(undermine : to weaken the basis of a prerogative or concept) "The actions of the city council undermined the mayor's authority." "The presentation of new evidence undermined the case presented by the defense."
This is undermined by its steadfast refusal to put its money where its mouth is.
One's credibility can be undermined if one is caught lying.
Daniel Shay led the rebellion that undermined the article of confederation.
One of the actions is how they both undermined a higher authority. Creon undermined the gods authority by not burying Antigone's brother, and King Saul undermined God's by saving Jonathon from dying.
It undermined the British economy in India.
Assuming this is a fill in the blank question, relativity undermined the view that time and space were absolute.
the human condition.
none
sapped or eroded
i don't think so.