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From Proto-Indo-European *dómh₂os, from root *demh₂- (“‘to build’”). Cognates include Ancient Greek δόμος (dómos) and Sanskrit दम (dáma). The same PIE root also gave Old English timber (“‘building, act of building’”) (English timber).
|genitive||domūs, domī||domuum, domōrum|
Domus is one of three common nouns that take the locative case, the other two being rus and humus. It is irregular in that it has a mix of second and fourth declension forms, the second declension forms being more commonly used in place constructions.
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