འ is a short a sound as in father?
But in འཁོར་བ this is pronounced kor-wa isn't it? So the འ is silent here but looking through the dictionary it doesn't seem to be the case usually that an initial འ is silent. Is there a rule for this?
Sorry about the flood of questions but my books are all in storage or I had to give them away and Tibetan language books don't come in Kindle versions yet. And after years of playing around I have finally started learning Buddhist Tibetan.