Reviewing the evidence of the spirantization of β (betacism) in Greek

1. Is there b sound in Greek?
2. When did b become v in Greek?
3. Is beta pronounced b or v?

Is there b sound in Greek?

Other common sounds, such as [b], [d] and [ɡ], do exist in Greek, but do not have single letters to represent them.

When did b become v in Greek?

Greek. In Classical Greek, the letter beta ⟨β⟩ denoted [b]. As a result of betacism, it has come to denote [v] in Modern Greek, a process which probably began during the Koine Greek period, approximately in the 1st century CE, along with the spirantization of the sounds represented by the letters δ and γ.

Is beta pronounced b or v?

In general, the second letter of the alphabet, beta, was pronounced as [b] in Plato's time, but was changed to [v] by the time the Gospels were written.