What does the Lakota word yelo mean in English?

The Lakota word "yelo" is a bit tricky. It's not a word that exists in its own right in Lakota.

It's possible that you are looking for a word that's related to, or sounds similar to, "yelo." For example, "yaelo" might be a misspelling of "yaelo," which means "father" in Lakota.

If you can provide more context or the full phrase "yelo" appears in, I might be able to give you a more accurate translation.