hupaithric
Roofless; open to the sky.
rare
Like an upaithric temple wide and high, Whose aëry dome is inaccessible, Was pierced with one round cleft through which the sunbeams fell.
that spacious cell
Where it comes from
Borrowed from Ancient Greek ὕπαιθρος (húpaithros) with the addition of -ic, the former from ὑπό (hupó, “under”) + αἰθήρ (aithḗr, “air, ether”).
Adapted from the Wiktionary entry hupaithric (CC BY-SA 4.0).