LATIN DICTIONARYLexicon Latīnum
suffixfirst/second-declension suffix

-eus1

-eus (feminine -ea, neuter -eum)
Classical[e.ʊs]Ecclesiastical[e.us]

Meaning

  1. morphemesuffixderives relational adjectives from nouns, used chiefly to indicate material composition
    Near-synonyms: -īnus, -us, -icus
  2. morphemesuffixfrom materials
    argentum (“silver”) + -eus → argenteus (“made of silver”)
    ferrum (“iron”) + -eus → ferreus (“made of iron”)
  3. morphemesuffixto form color adjectives
    nix (“snow”) + -eus → niveus (“snow-white”)
    purpura (“murex dye”) + -eus → purpureus (“purple”)
  4. morphemeraresuffixfrom other nouns
    taurus (“a bull, ox”) + -eus → taureus (“made from a bull's hide; pertaining to bulls, taurine”)
    Caesar + -eus → Caesareus (“pertaining to Caesar; imperial”)

Origins

From Proto-Italic *-eos, from Proto-Indo-European *-e- + *-yós. Compare with its adoption through Ancient Greek (Etymology 2).

Descendants
  • Catalan-i
  • English-eous
  • English-ean
  • French-eux
  • French-éen
  • Italian-eo
  • Portuguese-eo
  • Spanish-eo
suffix · masculinesecond declension
-eus2
-eus m (genitive -eī or -eos)
Classical[ɛu̯s]Ecclesiastical[eu̯s]

Meaning

  1. masculinemorphemeending found in adopted Greek male names
    Nereus
    Odysseus

Origins

Ancient Greek -εύς (-eús)bor. Latin -eus Borrowed from Ancient Greek -εύς (-eús).

Descendants
  • Catalan-eu
  • English-eus
  • Italian-eo
  • French-éefrom Middle French -ee
  • Portuguese-eu
  • Spanish-eo
suffixfirst/second-declension suffix
-ēus3
-ēus (feminine -ēa, neuter -ēum)
Classical[ˈeː.ʊs]Ecclesiastical[ˈɛː.us]

Meaning

  1. morphemesuffixending found in adopted Greek adjectives and substantives, surviving thus or as -īvus

Origins

* From adjectives ending in Ancient Greek -(ε)ιος (-(e)ios), compare -ius. * From Ancient Greek -εῖος /-ειος (-eîos), also from Proto-Indo-European *-e- + *-yós. Compare with its inherited form (Etymology 1). * From Ancient Greek -εῖος (-eîos), from Proto-Indo-European *-iH- + *-wós. Compare with its inherited form -īvus.

Descendants
  • Catalan-eu
  • English-ean
  • French-éen
  • Italian-eo
  • Portuguese-eu
  • Spanish-eo

Quick answers

What does -eus mean in Latin?
-eus, a suffix, means “derives relational adjectives from nouns, used chiefly to indicate material composition”.
How do you pronounce -eus?
In classical Latin, [e.ʊs]; in ecclesiastical (church) Latin, [e.us].