neutralize

[1]	void , annul , cancel (out) , nullify , invalidate , negate , delete , undo , make/render ineffective , counterbalance , counteract , offset , equalize , even , square , compensate for , make up for
[2]	neutralise , nullify , negate
[3]	counteract , countervail , counterbalance
[4]	neutralise , liquidate , waste , knock off , do in
[5]	neutralise
[6]	neutralise