Arpinum

According to DNGI, probably from a personal name hinted by the common name suffix -inum. Probably of Eastern Italic origin, perhaps from a name ultimately derived from Proto-Indo-European *h₂érkʷo- (“something bent, arrow”) and showing the Oscan and Volscian shift kw > p. The root could instead be *h₂erk- (“to lock, guard”).^[1]

• (Classical Latin) IPA^(key): [arˈpiː.nũː]
• (modern Italianate Ecclesiastical) IPA^(key): [arˈpiː.num]

Arpīnum n sg (genitive Arpīnī); second declension

1. an ancient city of the Volscians, situated on a hill above the valley of the Liris and birthplace of Cicero, now Arpino

Second-declension noun (neuter), with locative, singular only.

• arpīnās
• arpīnātēs
• arpīnus

• Italian: Arpino

• “Arpinum”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “Arpinum”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly
• Arpinum in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.