-eo

From Latin -eus.

• IPA^(key): /eo̯/

-eo m (feminine -ea, masculine plural -ei, feminine plural -ee)

1. Used to form adjectives referring to the qualities of the root noun; -en, -eous, -ean

• Terms formed with this suffix are stressed on the antepenultimate (penultimate if the sequence eo is interpreted as vowel + glide).
• The suffix is attached to the stem of a noun indicating a material or substance to express material composition:

Examples:

ferro (“iron”) → ferreo (“made of iron”)

argento (“silver”) → argenteo (“made of silver”)

acqua (“water”) → acqueo (“made of water, watery”)

• When the root is a proper noun, the adjective indicates relation:

Examples:

Cesare (“Caesar”) → cesareo (“Caesarean, of or pertaining to Julius Caesar”)

Medici → mediceo (“of or pertaining to the Medici family”)

• In some cases, adjectives descending from Latin exhibit fossilized characteristics which are otherwise lost in the root noun:

Examples:

corpo (“body”) → corporeo (“bodily, corporeal”) (cfr. Latin corpor-, oblique stem of corpus)

legno (“wood”) → ligneo (“wooden, made from wood”) (cfr. Latin lignum)

oro (“gold”) → aureo (“golden, made of gold”) (cfr. Latin aurum)

Ercole (“Hercules”) → erculeo (“Herculean, pertaining to Hercules”) (cfr. Latin Herculēs)

From Latin -aeus, from Ancient Greek -αῖος (-aîos).

• IPA^(key): /ˈɛo̯/
• Stress: -èo

-eo m (feminine -ea, masculine plural -ei, feminine plural -ee)

1. Used to form adjectives and nouns expressing relation to the root noun; -an, -ean

• The suffix is attached to place names to derive adjectives expressing a relationship of origin or relation, and to create ethnonyms:

Examples:

Etna → etneo (“of or pertaining to mount Etna; person from or inhabitant of the Etna region”)

Ragusa (city in Croatia) → raguseo (“of or pertaining to the city of Ragusa; person from or inhabitant of Ragusa”)

• If the root is a proper noun, the adjective indicates correlation:

Euclide (“Euclid”) → euclideo (“Euclidean, pertaining to Euclid”)

Augusto (“Augustus”) → augusteo (“Augustan, pertaining to emperor Augustus or his time”)

• It can also form adjectives related to body parts:

carotide (“carotid”) → carotideo (“pertaining to a carotid”)

faringe (“pharynx”) → faringeo (“pharyngeal, pertaining to the pharynx”)

• (Classical) IPA^(key): /e.oː/ (stressed on the antepenult)

From Proto-Italic *-ēō, from verbs with Proto-Indo-European *-éh₁yeti (stative suffix).

-eō

1. Forms stative verbs from adjectives.

• -ēscō

From Proto-Italic *-eō, from causative / frequentative verbs with Proto-Indo-European *-éyeti (causative suffix).

-eō

1. (no longer productive) Forms causative verbs from primary (third conjugation and some fourth conjugation) verbs.

See the etymology of the main entry.

-eō

1. dative masculine singular of -eus
2. dative neuter singular of -eus
3. ablative masculine singular of -eus
4. ablative neuter singular of -eus

• Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN

From Latin -eus.

-eo m (feminine -ea, masculine plural -eos, feminine plural -eas)

1. -eous; Used to form adjectives meaning resembling or having characteristics of the related term.

• -áceo
• -áneo
• -io

-eo m (plural -eos)

1. Used to create nouns from verbs suffixed with -ear.