How to ask what I didn't understand in conversations I want to know natural and simple ways to ask people to say what thay have said. When talking with native English speaker, I often miss what they have said. In such a situation, how should I ask them back if they can repeat that words? "I didn't understand what you said. Please said that again" is too long and not natural when talking with friends. But "what?" seems rude, right? I often say "what was that?" but I'm not sure if it's natural or even makes sense. Please teach me as many natural words or ways as you come up with.