First off, the pronunciation is not too hard but there’s many ways I’ve heard it said. Here’s how I pronounce it (whale-d). What is it? It refers to a time in history when the Navajo people were force marched from their homelands across NM and AZ to a desolate piece of land in southern NM. If you’re interested, here’s a book by Jennifer Denetdale recounting that horrible part of history.