Etymologically

lavatorium

Etymology and origin of the Latin word lavatorium

Confidence
Established
Formation
Derivation
First attested
1157 More words from the 12th century
Ultimate origin
Latin lavō
Etymology tree
inherited borrowed derived
Latin lavō
French laver
Italian lavare
Spanish lavar
Latin lavātōrium
English lavatory
From the same root
Latin dīluō ← lavō
Latin interluō ← lavō
Latin labrum ← lavō
Latin lautus ← lavō
Latin lōtiō ← lavō
Latin perluō ← lavō

Forms

lavātōrium n (genitive lavātōriī or lavātōrī); second declension[1]

Etymology

It is from Latin lavō + -tōrium,[1][2] or, as Etymonline puts it, the neuter of the adjective lavātōrius (“of washing”) used as a noun.[3] The verb goes back to Proto-Indo-European *lewh₃- (“to wash”).[1] Its Romance descendants include Italian lavatoio, French lavoir, Old Occitan lavador, Spanish lavadero and Portuguese lavadouro.[2]

Earliest recorded meaning

It first appears in the Greek–Latin glossaries, which explain it by Greek νιπτήρ (niptḗr, “washbasin”) and πλύσιμον (plúsimon),[4][2] that is, a place or vessel for washing.[5][6]

Semantic evolution

In medieval Latin it named a place for washing, a bath or washroom, and especially the lavatory of a monastery, usually in the cloister;[7][8] Lanfranc's monastic Constitutions send the monks to the lavatorium to wash and comb their hair.[7] It was also a vessel for washing the hands[9] and a watering place where horses were washed.[9] English took it over in the late 14th century as lavatory, at first for a washbasin.[3]

Timeline

  • 1157 – A charter of Louis VII of France names a watering place, the Lavatorium Coriani.[9]
  • 1184 – A Pipe Roll records work on the lavatory in the king's hall at Westminster.[7]
  • 1278 – Durham accounts record repairs to the lavatory at the refectory door.[7]
  • late 14th century – Borrowed into English as lavatory, “washbasin”.[3]
  • 1420 – An inventory lists three silver lavatoria, vessels for washing the hands.[9]

Meanings

Noun

  1. A place for washing; a washbasin.[5][6][4]
  2. (Medieval Latin) A lavatory or washroom, especially that of a monastery.[7][8][1]
  3. (Medieval Latin) A vessel for washing the hands.[9]
  4. (Medieval Latin) A watering place for horses.[9]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  3. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b Goetz, Georg (1888–1923), Corpus glossariorum Latinorum, Leipzig: Teubner; vols. VI–VII Thesaurus glossarum emendatarum, digital ed. CGLO, Munich: Bayerische Akademie der Wissenschaften
  5. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  7. ^ a b c d e 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
  8. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ a b c d e f du Cange, Charles du Fresne, et al. (1883–1887), Glossarium mediae et infimae latinitatis, augmented ed. by Léopold Favre, Niort: L. Favre
Cite this entry

“Lavatorium.” Etymologically, 7 Nov. 2026, etymologically.com/la/lavatorium. Accessed 8 Nov. 2026.

Last edited on . ·