Are "Yah" and "Way" common sounds in Hebrew?

I was wondering about the correct pronunciation of YHWH this morning, and it occurred to me that the correct pronunciation of the name might not use any common phonemes in the Hebrew language because they were so careful not to use His name. Let's say, for instance, that the word for cup was "Yah" (I don't know Hebrew, this is just a hypothetical), then wouldn't rabbis say it was forbidden to use the word lest you inadvertently use the Lord's name in vain? Just a thought, but we guess what the correct pronunciation of YHWH would have been, and that makes me wonder.