bad words

What makes a word bad is if it has a bad intention behind it. But then there's a huge gap of misunderstanding and different meaning of explaining a bad word to a high school student and a toddler. We don't really want a kid in preschool to be cursing out at recess and think it's okay just because he wasn't directing the bad word at an individual. An appropriate use of euphemism is when you know that the expression about to come out of your mouth is going to hurt someone. Another could be when you're about to curse and there's kids around so you kind of go around the words you're trying to say. It becomes phony and confusing when people use overly complicated and fancy words just to explain a simple word or expression that anybody would understand.