Today's Arabic letter is "ayn" ع
ayn is the 18th letter in the Arabic Script. It is an "a" sound pronounced from the back of the throat known as a "Pharyngal Voiced Fricative".
She has no English language equivalent, is one of my all-time favorites, and is one of the more challenging sounds for the uninitiated to make. Best of Luck.
ع "ayn" is today's letter.
غ "ghayn" is tomorrow's letter.