返す (かえす) means 'to return something.' This transitive verb is used when you give something back to its owner or original place. The object being returned is marked with 'を', and the recipient with 'に'. For instance, '本を返します' (Hon o kaeshimasu) means 'I return the book.'

返す(かえす)は「返す(かえす)」という意味(いみ)です。借(か)りた物(もの)を元(もと)の持(も)ち主(ぬし)に戻(もど)すときに使(つか)います。「本(ほん)を返(かえ)します」