Difference between Dampen and Undermine

DAMPEN vs UNDERMINE: 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 make damp or humid; apply moisture to; wet slightly; damp: as, the grass was dampened by a slight shower; to dampen clothes for ironing.
To put a check or damper upon; make weak or dull; dim; deaden. See damp.
Keep in check (a fire)
Check
Suppress or constrain so as to lessen in intensity

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.

Diminish, Hinder, Hamper, Tone down, Mute, Wash, Moisten, Dull, Break, Deaden, Muffle, Damp, Soften, Weaken, Stifle

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

Diminish, Hinder, Hamper, Tone down, Mute, Wash, Moisten, Dull, Break, Deaden, Muffle, Damp, Soften, Weaken, Stifle

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.