Student: What does ‘decimate’ mean?
Amanda Teacher: To destroy, to kill a lot of something.
Student: But you said ‘decem’ means ten. So…what does ten have to do with it?
Amanda Teacher: Hmm. Good question. Let’s find out. Um…apparently in ancient Rome they’d deal with bad soldiers by killing one in ten men in the ranks.
Amanda Teacher, to myself: Oh boy, your parents are going to be happy with my teaching today…