What is the name of the obsolete letter (Ï) representing the /w/ sound, which disappeared from most Greek dialects but survived in inscriptions until the 2nd century BCE?

Question

What is the name of the obsolete letter (Ï) representing the /w/ sound, which disappeared from most Greek dialects but survived in inscriptions until the 2nd century BCE?

Accepted Answer

digamma — Digamma (wau in earlier usage) represented the /w/ sound inherited from Proto-Indo-European and used in the earliest Greek alphabets; it was lost in Attic-Ionic but persisted in other dialects and is noted in Homeric meter.

Answer

stigma

Answer

koppa

Answer

sampi

What is the name of the obsolete letter (Ï) representing the /w/ sound, which disappeared from most Greek dialects but survived in inscriptions until the 2nd century BCE?

What is the name of the obsolete letter (Ï) representing the /w/ sound, which disappeared from most Greek dialects but survived in inscriptions until the 2nd century BCE?