abate
afflict
attenuate
blunt
bugger
cramp
cripple
damp
dampen
de-energize
deaden
debilitate
derange
devitalize
disable
disenable
disorder
drain
dull
enervate
eviscerate
exhaust
extenuate
gruel
hamstring
hors de combat
hospitalize
inactivate
incapacitate
indispose
invalid
kibosh
lame
lay low
lay up
maim
mitigate
put
queer
queer the works
rattle
reduce
sabotage
sap
shake
shake up
sicken
soften up
weaken
emaciate
macerate
waste
enfeebled
enfeebles
enfeebling
feeble