vitiate
Corrupt from within
To vitiate something is to impair or undermine its quality, effectiveness, or validity.
The word appears most often in legal and formal contexts: a procedural error may vitiate a contract, or flawed methodology can vitiate research findings.
The underlying idea is corruption or spoiling—something that should be sound is rendered defective or void.
Corrupt or distort
distort · subvert · falsify · adulterate · contaminate · poison · taint · defile
pervert
Corrupt or distort
warp · distort · subvert · falsify · adulterate · contaminate · poison · taint · defile · spoil
nullify
Make of no effect
rescind · quash · abrogate · negate · vacate · overturn · countermand · cancel · set aside · strike down
impair
To diminish or damage
debilitate · attenuate · sap · erode · compromise · dilute · reduce · lessen · detract · harm
- cancelcancel, annul, nullify, invalidate, revoke
- undermineweaken, erode, sabotage, subvert, destabilize