eftsoonery

noun

1. (countable, informal, rare, uncountable)The use of extremely obscure and archaic language.

   “To the comic and the colloquial of Chaucer's art Mr. Krapp does full justice. Having undertaken to modernize Chaucer, he avoids the affectation of archaic words; he has no "eftsoonery." Some of his phrases are very modern indeed.”

   “Thus The Tournament was called "lapidary" in its style (though plain in its dialogue and free of "eftsoonery"), a kaleidoscope rather than a chronicle.”

   “Eglinton remarks, "The peatsmoke is going to his head," and Stephen apparently sums up his own feelings about the "cultic twalette," English Gaelophiles, and [Douglas] Hyde's eftsooneries and versification […]”