Our Mailbag is once again full of questions, and podcasting luminary Helen Zaltzman is here to help us answer them!

Why is the raspberry sound (PBTPBBBBT) not a speech sound in any language? Or is it? How can sounds in a language change so much over time? Am I BURNED OUT? Or BURNT OUT? Why are they called metaphysicians and not metaphysicists? What can we call something besides LAME? Why is AMPHI- so infrequently used in English?