…a person or thing that prevents incompatible or antagonistic people or things from coming into contact with or harming each other…
…an elderly man who is considered to be foolishly old-fashioned, unworldly, or incompetent…
…a small neutral country, situated between two larger hostile countries, serving to prevent the outbreak of regional conflict…
…a flammable compound that forms a corrosive solution in water and is used as a buffer and emulsifying agent…
…a solution that resists changes in pH when acid or alkali is added to it. Buffers typically involve a weak acid or alkali together with one of its salts…
