abate
answer
answer conclusively
argue down
attenuate
blunt
bugger up
confound
confute
contradict
controvert
cramp
cripple
crush
damage
damp
dampen
dash
deaden
debilitate
defeat
demolish
deny
devitalize
disable
dismiss
dispose of
drain
dull
enervate
enfeeble
eviscerate
exhaust
extenuate
finish
floor
foil
frustrate
gruel
harm
honeycomb
hurt
impair
lay low
mine
mitigate
nonplus
overset
overthrow
overturn
undermined
undermines
undermining
undergird