It's similar to say "uccidere". Io ti voglio ammazzare/uccidere = I want to kill you. We sometimes use that word in another sense: "ammazzare il tempo". That espression is used to say "far passare il tempo". For example: you are going to the pub at 9 p.m. but It's 8 p.m. and you are bored, you can't know what you can do in that hour. So you decided to play computer games. In this case you play computer games for "ammazzare il tempo".

/ammazzare/ e` simile a /uccidere/ e in inglese si dice /to kill/.

è un sinonimo di "uccidere", "to kill"

杀死