Difference between Undermine and Counteract

UNDERMINE vs COUNTERACT: NOUN

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 oppose and mitigate the effects of by contrary action; check.
To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence.

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.
Figuratively, to subvert by removing clandestinely the foundation of; injure by invisible, secret, or dishonorable means.
To injure, weaken, or destroy insidiously or indirectly; wear away; wear out; sap.

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

Countering, Alleviate, Negate, Mitigate, Antagonise, Countercheck, Countermine, Antagonize, Sabotage, Weaken, Subvert, Countervail, Undermine, Counterbalance, Neutralize

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

Thwart, Offset, Forestall, Minimize, Dispel, Stem, Countering, Negate, Mitigate, Countermine, Antagonize, Weaken, Subvert, Undermine, Neutralize

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.