Square root, cube root - spelling Hello everyone! I got a question and I'm not sure if I can google the answer. There is a square root, cube root. What do English native speakers call for example 81 to the power of one-fourth, one-fifth? It's a lame way of spelling it right? I hope you got my question and you know what I mean. Please spell it out if you can. I'll be enormously grateful for that! Thank you!