Etymologically

inquilinus

Etymology and origin of the Latin word inquilinus

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin (colō)
Etymology tree
inherited borrowed derived
Latin colo
French couler
French couloir
Latin cultura
English culture
English cultural
German Kultur
Latin inquilinus
Latin percolo
Latin excolo
Latin recolo

Pronunciation

  • Classical: [ɪŋ.kʷɪˈliː.nʊs][1]
  • Ecclesiastical: [iŋ.kʷiˈliː.nus][1]

Forms

inquilīnus m (genitive inquilīnī, feminine inquilīna); second declension[1] Lewis and Short also give an adjective inquilīnus, -a, -um.[2]

Etymology

It is from Latin in- (“in”) + colō1 (“to inhabit”) + -īnus,[3][1] built on an old stem ⟨*quil-⟩ of the verb rather than on ⟨col-⟩.[3] De Vaan notes that the word is not recorded before Cicero; if it is old, it shows a Proto-Italic /kʷe/ becoming /kʷi/ before a palatal /l/, instead of the change to /kʷo/ seen in the verb.[4] Wiktionary reconstructs Proto-Italic *enkʷilīnos.[1] Lewis and Short and Etymonline explain it instead as standing for ⟨*incolīnus⟩, from incola “inhabitant”;[2][5] the TLL also derives it from that noun, like ⟨Esquilīnus⟩, and reports Leumann's view that vīcīnus “neighbour” influenced its meaning.[6]

Earliest recorded meaning

Köbler and the OLD find it first in Cicero,[7][3] who in the Second Philippic says that while his opponent was the tenant of a house, not its owner, the whole place rang with the voices of drunkards (tē inquilīnō, nōn enim dominō).[3][2]

Semantic evolution

The word named someone living in a place that was not his own, especially a lodger or tenant beside the owner (dominus):[2][8] Suetonius speaks of the tenants of private houses and blocks of flats, and Seneca and Martial of a lodger in the same house.[2][8] More generally it meant an inhabitant, as of the dwellers of a village on the Po in Pliny the Elder, and Ammianus calls some men the permanent inmates of the prisons.[3][2][8]

It was easily turned to scorn: Sallust reports Cicero being called an inquilīnus cīvis urbis Rōmae, a citizen who was a mere lodger in Rome, since he was not born there.[2][8][9] Seneca calls students who attend lectures without learning anything “lodgers, not disciples”, Varro has vices moving in as lodgers, and Tertullian makes the soul the lodger of the flesh.[2][9] Roman law used it of a kind of serf, perhaps at first a barbarian settled on Roman land.[3]

Medieval Latin used it for a foreigner and for a free tenant or cottar;[10] British lawyers distinguished the inquilīnus who rents a house in town from the colōnus who farms the land.[11] It survives in Italian inquilino “tenant”.[9] English inquiline meant “lodger” from the 1640s and took its zoological sense, an animal living in another's dwelling, in 1865.[5]

Timeline

  • 116–27 BC – Varro uses it figuratively of vices as lodgers.[2][7]
  • 81–43 BC – Cicero uses it of the tenant of a house.[3][2][7]
  • 86–34 BC – Sallust reports Cicero being called an inquilīnus citizen.[2][9][7]
  • 23/24–79 AD – Pliny the Elder uses it of the inhabitants of a village.[3][7]
  • c. 160–220 AD – Tertullian calls the soul the lodger of the flesh.[2][9][7]
  • 1640s – English borrows it as inquiline “lodger”.[5]

Meanings

Noun

  1. A lodger or tenant, one who lives in another's house.[3][2][8]
  2. An inhabitant, denizen.[3][2]
  3. (figurative) A mere sojourner, one who is present without belonging.[2][9]
  4. (law) A kind of serf, perhaps originally a barbarian settled on Roman territory.[3]
  5. (Medieval Latin) A foreigner; a free tenant, cottar.[10][11]

Adjective

  1. Of foreign birth, not native.[2][9]

Word family

  • inquilīnātus
  • inquilīnō

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  3. ^ a b c d e f g h i j k Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  7. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  8. ^ a b c d e Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  9. ^ a b c d e f g Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  10. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  11. ^ a b Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
Cite this entry

“Inquilinus.” Etymologically, 20 Oct. 2026, etymologically.com/la/inquilinus. Accessed 20 Oct. 2026.

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