neutralize
neu.tral.ize \'n(y)u:-tr*-.li-z\ vt 1: to make chemically neutral 2: to destroy the effectiveness of : NULLIFY 3: to make electrically inert by combining equal positive and negative qua ntities 4: to invest with conventional or obligatory neutrality conferring inviola bility under international law by belligerents 5: to make neutral by blending with the complementary color : to undergo neutralization - neu.tral.iz.er n