Lavinium

Unknown, but possibly from Proto-Indo-European *lewh₃- (“to wash”), meaning "a bathing-place (for animals)".^[1] Synchronically derived from Lavīnum, an alternative form of the town's name. Roman legend derives it from Lā̆vīnia, daughter of the king of the Latins and wife of Aeneas.

• (Classical Latin) IPA^(key): [ɫaːˈwiː.ni.ũː], [ɫaˈwiː.ni.ũː]
• (modern Italianate Ecclesiastical) IPA^(key): [laˈviː.ni.um]

Note: the first vowel in this form always scans long in dactylic poetry, but always short in the alternative form Lavīnum.

Lā̆vīnium n sg (genitive Lā̆vīniī or Lā̆vīnī); second declension

1. port city near Rome, legendarily founded by Aeneas

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

¹Found in older Latin (until the Augustan Age).

• Lā̆vīnienses

• Italian: Lavinio
• Ancient Greek: Λαουΐνιον (Laouḯnion)

• “Lavinium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press