preventative
preventive
annulment
bafflement
balk
balking
buck-passing
cancellation
check
checkmate
circumvention
confounding
counterbalancing
defeat
discomfiture
disconcertion
elusion
evasion
foil
foiling
frustration
getting around
getting round
invalidation
neutralization
nullification
offsetting
outguessing
outmaneuvering
outwitting
passing the buck
the runaround
the slip
undoing
upset
vitiation
voiding
hinderance
hindrance
interference
aborting
cavorting
consorting
courting
deporting
distorting
exhorting
exporting
extorting
importing
nonsporting
porting
purporting
reporting
resorting
shorting
snorting
sorting
sporting
supporting
transporting
underreporting