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dormitory

/ˈdɔː.mɪ.tɹi/ noun

In Latin: dormitorium Wiktionary

Origin

From Middle English dormitory, dormytory, dormytorye, borrowed from Latin dormītōrium (“a sleeping-room”), from dormiō (“to sleep”). Doublet of dormitorium and dorter.

From Wiktionary, via Kaikki.org (CC BY-SA)