Itacism
Itacism , noun
[Compare French itacisme. See Etacism, and compare Iotacism.]
(Greek Grammar) Pronunciation of η (eta) as the modern Greeks pronounce it, that is, like e in the English word be. This was the pronunciation advocated by Reuchlin and his followers, in opposition to the etacism of Erasmus. See Etacism.
In all such questions between ε and αι the confusing element of itacism comes in.