fenestra
noun
a small opening or perforation, as in a bone, especially between the middle and inner ear.
The grammatical form denoting more than one person, place, thing, or idea.
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The usual explanation, which makes insertas an epithet transferred by a sort of hypallage from Luna to fenestras, is extremely violent, and makes the word little more than a repetition of se fundebat.
From The Aeneid of Virgil by Virgil