[Nerwen]

Originally Posted by Galin

Anyway as far as -hai goes we now know it means 'folk' due to Words, Phrases, and Passages.

So Uruk-hai means 'orc-folk' -- but since uruk 'orc' became distinguished from snaga it means 'great-soldier orc-folk'

I did know that, actually, and it's one of the reasons I'm sceptical of this fellow Rumil quotes–

This is where the addition of human remains would be important to the creation of your "Man-Orc" or Uruk-Hai

Now, while Uglúk & Co. call themselves "Uruk-hai", the word does not mean "Man-Orc hybrid" (and is a plural). So– failing some evidence that Tolkien changed his mind about that one too– I'd say even if this person has come upon some previously unknown document, he's embellished the contents pretty heavily.