Difference between Undermine and Weaken

UNDERMINE vs WEAKEN: NOUN

To become weak or weaker; to lose strength, spirit, or determination; to become less positive or resolute.

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 dig a mine or tunnel beneath.
To weaken by wearing away a base or foundation.
To weaken, injure, or impair, often by degrees or imperceptibly; sap.

To make weak; to lessen the strength of; to deprive of strength; to debilitate; to enfeeble; to enervate.
To reduce in quality, strength, or spirit.

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.

To make weak or weaker; lesson or reduce the strength, power, ability, influence, or quality of: as, to weaken the body or the mind; to weaken a solution or infusion by dilution; to weaken the force of an argument.
To become weak or weaker: as, he weakens from day to day.
(transitive; intransitive verb) To make or become weak or weaker.

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

Undercut, Worsen, Diminish, Erode, De escalate, Step down, Countermine, Damp, Break, Counteract, Sabotage, Subvert, Soften, Dampen, Undermine

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

Hamper, Hinder, Cripple, Undercut, Worsen, Diminish, Erode, Countermine, Damp, Break, Counteract, Subvert, Soften, Dampen, Undermine

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.

There are traumas in life that weaken us.
Stretching the truth will only weaken your case.
Muscles tend to shorten and weaken with age.
It can even weaken the entire immune system.
Virtually all knots weaken line in various degrees.
All of that can weaken your lash lift.
Farm laws will weaken mandi system: Sharad Pawar.
So using the with end with, we can delete their sweetened delete this weaken, Delete this weaken.
Gaonic authority and caliphal authority were, the ga on implied, bound up with each other: weaken one and you weaken the other.
To weaken one is to weaken the other.