neutralization

transitive verb neutralized -·ized′, neutralizing -·iz′·ing

1. to declare (a territory, nation, etc.) neutral in war; declare open to all nations under international law and exempt from attack
2. to make ineffective; destroy or counteract the effectiveness, force, disposition, etc. of
3. Chem. to destroy the distinctive or active properties of an alkali neutralizes an acid
4. Elec. to make electrically neutral

Etymology: Fr neutraliser