| action intended to nullify the effects of some previous action | an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh |
| action intended to keep a country politically neutral or exclude it from a possible war | |
| (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation) | |
| 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 | |