1) an oil with a pleasant smell, used for smoothing pain or healing (balm)

2) a metal tool with a rough surface, used for cutting or smoothing hard substances; any kind of folder, case etc used for keeping papers etc together (file)

3) the commonest metal (symbol Fe), used in manufacturing and building, an also forming an essential part of blood; a flat-bottomed implement heated and used for smoothing clothes etc (iron)