Cases of word usage

1) (of a gun) to fail to send a bullet (misfire)

2) (an instance of) the movement in another direction (of a stone, bullet etc) after hitting something (ricochet)

3) the pieces of an exploded shell or bullet (shrapnel)

4) a sound as of a bullet going through the air, or of the sudden tearing of cloth; a device with two toothed metal or plastic edges fastened together by means of a sliding tab, used for fastening articles of clothing; to open or close a coat, bag etc using a zip (zip)