The missing letter from the Greek alphabet that most people often refer to is the letter ‘Sampi’. It is a letter that was used in ancient Greek but eventually fell out of use.
Sampi was used to represent the ‘s’ sound in certain contexts. Over time, as the Greek language evolved, the need for this letter diminished, leading to its exclusion from the modern version of the Greek alphabet that we use today.
This letter can still be seen in some ancient texts and inscriptions, showcasing the rich history and evolution of the Greek language. It’s fascinating to note how alphabets change and adapt over time!