Etymology
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domicile (n.)

mid-15c., "place of residence of a person or family," from Old French domicile (14c.) and directly from Latin domicilium, perhaps from domus "house" (from PIE root *dem- "house, household") + colere "to dwell" (see colony). In law, specifically, "that residence from which there is no intention to remove, or a general intention to return" (mid-18c.).

As a verb, "to establish in a fixed residence," it is attested by 1762 (implied in domiciled). Related: Domiciliary.

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*dem- 

Proto-Indo-European root meaning "house, household." It represents the usual Indo-European word for "house" (Italian, Spanish casa are from Latin casa "cottage, hut;" Germanic *hus is of obscure origin).

It forms all or part of: Anno Domini; belladonna; condominium; dame; damsel; dan "title of address to members of religious orders;" danger; dangerous; demesne; despot; Dom Perignon; domain; dome; domestic; domesticate; domicile; dominate; domination; dominion; domino; don (n.) "Spanish, Italian, and Portuguese title of respect;" Donna; dungeon; ma'am; madam; madame; mademoiselle; madonna; major-domo; predominant; predominate; timber; toft.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit damah "house;" Avestan demana- "house;" Greek domos "house," despotēs "master, lord;" Latin domus "house," dominus "master of a household;" Armenian tanu-ter "house-lord;" Old Church Slavonic domu, Russian dom "house;" Lithuanian dimstis "enclosed court, property;" Old Norse topt "homestead."

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