What do you think the currently unknown epithets mean?

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I am curious as to why Uryu got A like Yhwach. Since Yhwach has the ability to augment other Quincy's abilities and such, wouldn't it make sense if A stood for Augment? Before it was said that Uryu showed unique skill for his age with Quincy abilities, so it that because he is unknowingly augmenting his own powers? Just something I thought about recently.