Difference between Contradict and Undermine

CONTRADICT vs UNDERMINE: NOUN

To be contrary to; to oppose; to resist.
To assert the contrary of; to oppose in words; to take issue with; to gainsay; to deny the truth of, as of a statement or a speaker; to impugn.

To weaken by wearing away a base or foundation.
To weaken, injure, or impair, often by degrees or imperceptibly; sap.
To dig a mine or tunnel beneath.
To excavate the earth beneath, or the part of, especially for the purpose of causing to fall or be overthrown; to form a mine under; to sap.
Fig.: To remove the foundation or support of by clandestine means; to ruin in an underhand way.

To assert the contrary or opposite of; deny directly and categorically: as, his statement was at once contradicted.
To deny the words or assertion of; address or speak of in contradiction: as, he contradicted the previous speaker; I contradicted him to his face.
To oppose; act or be directly contrary to; be inconsistent with: as, the statement which was made contradicts experience.
To speak or declare against; forbid.
Synonyms To gainsay, impugn, controvert, dispute. To contravene.
To utter a contrary statement or a contradiction; deny.
Show to be false
Prove negative

To injure, weaken, or destroy insidiously or indirectly; wear away; wear out; sap.
Figuratively, to subvert by removing clandestinely the foundation of; injure by invisible, secret, or dishonorable means.
To form a mine under; sap; render unstable by digging or wearing away the foundation of; make an excavation beneath, especially for the purpose of causing to fall, or of blowing up: as, to undermine a wall; a river undermines its banks.

Disavow, Violate, Gainsay, Antithetical, Rebut, Undermine, Disprove, Contradictory, Refute, Contrary, Oppose, Negate, Controvert, Belie, Contravene

Tarnish, Endanger, Hinder, Destabilize, Hamper, Derail, Jeopardize, Erode, Undercut, Cave, Countermine, Counteract, Sabotage, Subvert, Weaken

Invalidate, Conflicted, Violate, Antithetical, Rebut, Undermine, Disprove, Contradictory, Refute, Contrary, Oppose, Negate, Controvert, Belie, Contravene

Imperil, Tarnish, Endanger, Hinder, Destabilize, Hamper, Derail, Jeopardize, Erode, Undercut, Cave, Countermine, Counteract, Subvert, Weaken

Without forgiveness, the betrayal will undermine meaningful relationships.
Two features of this history undermine that argument.
This alone will ultimately undermine trust in SAFe.
Trade agreements must never undermine German safety standards.
States might act to undermine the National Legislature.
Marshall Plan and undermine American power in Europe.
It would undermine our Ukraine policy and it would undermine our national security.
Whoever does not seek to undermine has sufficient arguments why not to undermine.
Their goal is to undermine and spread disunity in the West, to undermine liberal democracy as a principle.
To do otherwise would undermine the rule of law and undermine our constitutional system of government.