How to pronounce “untying” in English

You can release there Mongo, thank you.How do you take the ring off of the rope without untying the knot?It's kind of a Zen like concept.

So I was 26 at the time.And I can remember after taking my father off drugs, untying him, and having a conversation in which I lethim know that he was quite ill and in fact he might be, it looked, the doctors thought that he didn't have