-urnus

Latin

Alternative forms

Etymology

By reanalysis of diurnus (“of the day”), which is from obsolete nominative diūs + -nus. Probably first spread to nocturnus (“of the night”) analogically, then to other terms.

Pronunciation

Suffix

-urnus (feminine -urna, neuter -urnum); first/second-declension suffix

  1. Enlargement of -nus (suffix forming adjectives).
    ‎albus + ‎-urnus → ‎alburnus
    ‎diū (comparative stem: diūt-) + ‎-urnus → ‎diūturnus
    ‎nox (oblique stem: noct-) + ‎-urnus → ‎nocturnus
    ‎tacitus + ‎-urnus → ‎taciturnus

Declension

First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative -urnus -urna -urnum -urnī -urnae -urna
Genitive -urnī -urnae -urnī -urnōrum -urnārum -urnōrum
Dative -urnō -urnō -urnīs
Accusative -urnum -urnam -urnum -urnōs -urnās -urna
Ablative -urnō -urnā -urnō -urnīs
Vocative -urne -urna -urnum -urnī -urnae -urna

Derived terms

Latin terms suffixed with -urnus

References

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