neutralize (v.)

• abrogate
• annul
• balance
• buffer
• cancel
• compensate
• conquer
• counteract
• counterbalance
• countercheck
• counterpoise
• countervail
• cushion
• damp
• dampen
• deaden
• defeat
• delete
• equalize
• even
• frustrate
• invalidate
• negate
• negative
• nullify
• offset
• overcome
• override
• overrule
• redress
• soften
• square
• stultify
• subdue
• suppress
• thwart
• undo
• vitiate
• void