THESAURUS
bugger, cripple, de-energize, debilitate, disable, disenable, drain, enfeeble, hamstring, hors de combat, incapacitate, kibosh, lame, maim, put, queer, queer the works, sabotage, spike, unfit, weaken, wing, wreck
ROGET THESAURUS
Unproductiveness
VB
be unproductive, hang fire, flash in the pan, come to nothing, sterilize, addle, disable,
inactivate.