mercatus

• (Classical Latin) IPA^(key): /merˈkaː.tus/, [mɛrˈkäːt̪ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /merˈka.tus/, [merˈkäːt̪us]

From mercor (“I trade, traffic, deal”) +‎ -tus (action noun suffix).

mercātus m (genitive mercātūs); fourth declension

1. trade, traffic, buying and selling
2. market, marketplace
3. festival assemblage, public feast

• Italo-Romance:
  • Italian: mercato
    • → French: mercato
    • → Spanish: mercato
  • Neapolitan: mercato
  • Sicilian: mircatu
• Padanian:
  • Friulian: marcjât
  • Ladin: marcià
  • Romansch: marcua
  • Venetan: mercà, marcà
• Gallo-Romance:
  • Catalan: mercat
  • Franco-Provençal: marchiê
  • Old French: marchié (see there for further descendants)
  • Occitan: mercat
• Ibero-Romance:
  • Asturian: mercáu
  • Galician: mercado
  • Portuguese: mercado
  • Old Spanish: mercado
    • Ladino: merkado
    • Spanish: mercado (see there for further descendants)
• Insular Romance:
  • Sardinian: mercadu, melcadu
• Borrowings: (see there for further descendants)
  • → Proto-Brythonic: *marxad
  • → Old Irish: margad
  • → Proto-West Germanic: *markat

• mereō

mercātus (feminine mercāta, neuter mercātum); first/second-declension participle

1. perfect passive participle of mercor

• “mercatus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “mercatus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• mercatus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• mercatus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.