अर्थ : A chemical reaction in which an acid and a base interact with the formation of a salt. With strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water.

अर्थ : (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation).

अर्थ : Action intended to keep a country politically neutral or exclude it from a possible war.

अर्थ : Action intended to nullify the effects of some previous action.