Q. 67 Which is the sixth commandment? A. The sixth commandment is, Thou shalt not kill. Today we are going to look at this commandment in an introductory way. In future weeks we will look at its broader implications. What does the word kill or murder mean in the sixth commandment? At first, it might seem a little silly to ask such a question… but there is much confusion about it as can be seen from the questions people ask about it.