The Pronunciation of New Testament Greek
How do we know how Koine Greek was pronounced?
we look at spelling interchanges ...
Look at ancient inscriptions
Inscriptions are important because they preserve the original spelling of the scribe at the time it was written.
Mark all spelling interchanges
Historical phonologists can make a record of every time a scribe spells a word differently: e.g., an English speaker might spell tough as t-u-f-f.
Look at ancient papyri
Like inscriptions, papyri also provide a window into the exact spelling of the scribe at the time of composition.
Analyze spelling equivalences
By comparing where spelling mistakes occur, we can conclude what sounds were pronounced the same: e.g., from above, we may conclude that gh = ff.