-eus

From the French -eux, from the Latin -ōsus.

• IPA^(key): /øːs/

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-eus

1. suffix used to form adjectives

   ambitie → ambitieus

From Proto-Indo-European *-e- + *-yós. Confer with its adoption through Ancient Greek (Etymology 2).

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

-eus m (feminine -ea, neuter -eum); first/second declension

1. (with materials) Used to form adjectives from nouns, and so to nominally indicate the source of an attribute.

   ‎argentum (“silver”) + ‎-eus → ‎argenteus (“made of silver”)

   ‎ferrum (“iron”) + ‎-eus → ‎ferreus (“made of iron”)

   ‎marmor (“marble”) + ‎-eus → ‎marmoreus (“made of marble”)

   ‎pīnus (“pine tree”) + ‎-eus → ‎pīneus (“made of pine”)

First/second declension.

• -āceus
• -āneus
• -uleus

• English: -eous
• Italian: -eo
• Spanish: -eo

• From Ancient Greek -εῖος (-eîos), also from Proto-Indo-European *-e- + *-yós. Confer with its inherited form (Etymology 1).
• From Ancient Greek -εῖος (-eîos), from Proto-Indo-European *-iH- + *-wós. Confer with its inherited form -īvus.

• (Classical) IPA^(key): /ˈeː.us/, [ˈeː.ʊs]

-ēus m (feminine -ēa, neuter -ēum); first/second declension

1. In adopted Greek words, surviving thus or as -īvus.

   mūsēum (μουσεῖον (mouseîon), cf. mūsīvum from the same source)

First/second declension.

• “-eus” on page 628/3 of the Oxford Latin Dictionary (1st ed., 1968–82)

-eus

1. Alternative form of -us