-monium

From Proto-Indo-European *-monyom, from *-mō.

Note that, as in Ancient Greek δαιμόνιον (daimónion), the -o- should be short, but, as in Latin the declension of -mō (e.g. sermō) was contaminated by the nominative case and thus made -mōn- instead of -mon-, this derivation was apparently contaminated also.

• (Classical) IPA^(key): /ˈmoː.ni.um/, [ˈmoːniʊ̃ˑ]
• (Ecclesiastical) IPA^(key): /ˈmo.ni.um/, [ˈmɔːnium]

-mōnium n (genitive -mōniī or -mōnī); second declension

1. Forms collective nouns and nouns designating legal status or obligation from other nouns.

   pater (“father”) → patrimōnium (“inheritance”)

   māter (“mother”) → mātrimōnium (“marriage”)

   testis (“witness”) → testimōnium (“evidence”)

• daemonium, lēmōnium, scammōnium, harmonia etc. are borrowed from Ancient Greek.

Second-declension noun (neuter).

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

• -mōnia