-ius

See also: ius, Ius, and IUs

Latin

Pronunciation

  • (Classical) IPA(key): /i.us/, [i.ʊs] (stressed on the antepenult)

Etymology 1

From Old Latin -ios, from Proto-Indo-European *-yós.

Suffix

-ius m (feminine -ia, neuter -ium); first/second declension

  1. forming adjectives from nouns
Declension

First/second declension.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
nominative -ius -ia -ium -iī -iae -ia
genitive -iī -iae -iī -iōrum -iārum -iōrum
dative -iō -iō -iīs
accusative -ium -iam -ium -iōs -iās -ia
ablative -iō -iā -iō -iīs
vocative -ie -ia -ium -iī -iae -ia
Usage notes

The suffix -ius is added to a noun to form an adjective indicating "made of" or "belonging to" that noun.

Examples:
pater (“father”) + ‎-ius → ‎patrius (“paternal”)
rēx (“king, ruler”) + ‎-ius → ‎rēgius (“kingly, royal”)
uxor (“wife”) + ‎-ius → ‎uxōrius (“uxorious”)
Derived terms
► <a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Latin_words_suffixed_with_-ius'>Latin words suffixed with -ius</a>
Synonyms

References

Etymology 2

See -ior (suffix forming adjectives’ comparative degrees).

Suffix

-ius

  1. nominative neuter singular of -ior
  2. accusative neuter singular of -ior
  3. vocative neuter singular of -ior

Etymology 3

See -ō (suffix forming adverbs).

Suffix

-ius

  1. comparative degree of -ō

Etymology 4

From Proto-Italic *-osjo, itself from Proto-Indo-European *-ósyo, genitive case suffix.

Suffix

-ius

  1. genitive suffix for some irregular pronouns.
Usage notes

It is only used in specific irregular pronouns for the genetive case.

Examples
qui, cuius
hic, huius
is, eius
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