Imagine the sound you would make if someone suddenly ran into you. It would sound like "uh!" Some people call that sound "schwa". That's the sound of the letter 𐑩.

This sound is special, because it can never live in a stressed syllable— only an unstressed syllable.

This sound is one of the commonest, and yet there is no letter in the ordinary alphabet for this sound. Other vowels turn into 𐑩 when they are pronounced in an unstressed syllable. For this reason, any of the vowels in the ordinary alphabet can stand for this sound: it's "a" in "metal", "o" in "bacon", and "e" in "camel".

You already know the letter 𐑪. If you think of the vowels pointing at one another in the word "agog", 𐑩𐑜𐑪𐑜, it might help you to remember the shape of 𐑩.