The name of the tengwa 11. Its former name was Charma and in Quenya it had the value ch in all positions. After Quenya ch was softerned to h it got the name Acha and was later used mainly in the middle of the words where ch remained unchanged. However medial ch was softened once more even in middle of words and it became Aha.
It had the value ch in Sindarin. In Westron it was named Shé and had the value of sh.