It undermines a teacher's authority if the principal doesn't support her in matters of discipline.
The West is accused of deliberately trying to undermine this nation's government.
Lowering prices now will just undermine our publicity efforts at selling our product line as the
choice of quality.
Ignoring a cancer patient's questions or concerns undermines his ability to deal properly with the disease.
The boss undermined his confidence by constantly criticizing his every little mistake.
Your continued inability to quit smoking will only undermine
our efforts to treat your heart disease.
The U.S. maintains that the warlord is undermining all efforts to negotiate a peaceful resolution to the conflict.
Attempts by the government of Thailand to upgrade medical services in the country have been undermined by the emigration of doctors to
more highly-paid practices in the West.
The party's poor showing in the election has seriously undermined support for the current leader.
I felt totally undermined when my co-worker went to my boss to complain about my work without speaking to me first.
Failing this next test will seriously undermine your chances of getting accepted into a good university next year.
It was once suggested that rock 'n' roll is part of a pest to undermine the morals of the youth of our nation.
The North Vietnamese used guerrilla warfare to undermine the superior military strength of the Americans.
The Buddha wondered if people would ever be interested in a teaching that undermines their whole sense of existence at the root.
The bishop wrote a letter to the newspaper saying that homosexuality, adultery, prostitution and pornography undermine the foundations of the family, the basis of society.