- a country named after the root, whether that is a people, person, city, or river
- japano (“a Japanese person”) + -io → Japanio (“Japan”)
- Kolumbo (“Columbus”) + -io → Kolumbio (“Columbia”)
- Romo (“Rome”) + -io → Romio (“the Roman Empire”)
- Niĝero (“the Niger River”) + -io → Niĝerio (“Nigeria”)
- Esperanto (“the Esperanto language”) + -io → Esperantio (“a notional Esperanto-speaking land”)
- a science named after its practitioner
- (country): -ujo for countries named after their inhabitants: Anglujo (“England”) (archaic)
- (country): lando is also sometimes used for countries named after inhabitants: Svedlando = Svedio (“Sweden”)
- (science): scienco is used like a suffix with root words to form names of some sciences: vulkanoscienco = vulkanologio (“volcanology”)
-io (front vowel harmony variant -iö)
- Forms nouns from verbs or verbal stems.
- Forms nouns from other nouns, adjectives, numbers or their stems.
|Inflection of -io (Kotus type 3/valtio, no gradation)|
Borrowing from English -ia, French -ie, Italian -ia, Russian -ия (-ija), Spanish -ia, ultimately from Latin -ia, from Ancient Greek -ία (-ía).
- suffix denoting the country, region, domain, territory or province dependent upon the authority of a person
A common but false misconception is that countries that end with -ia in Ido, for example Albania, uses this suffix when in fact it's part of the root itself. Though, -io at times can help shape country names to fit; Mexikia uses the extra i so not to be confused with Mexiko (“Mexico City”) at the same time resembling other country names.
- IPA(key): /ˈi.o/, [ˈiːo]
- Stress: -ìo
Unknown. Perhaps from Latin -ērium.
-io m (plural -ii)
- Used to derive adjectives from verbs with durative, intensive or frequentative connotation; -le
-io m (plural -ii)
- Alternative form of -ivo
- IPA(key): /jo/, [jo]
- Forms the name of chemical elements; -ium
Suffix -ō on i-stems.
-iō f (genitive -iōnis); third declension
- Used to form abstract nouns from verbs.
The suffix -iō is added to a verb to create a third-declension feminine abstract noun.
- Andrew L. Sihler (1995) New Comparative Grammar of Greek and Latin, New York, Oxford, Oxford University Press
From Latin -ium, from the adjectival suffix -ius.
- IPA(key): [ˈ-i.o]
- (added to nouns) A suffix forming abstract nouns.
- Spanish: -ío
From New Latin -ium, from Latin -um, based on Latin terms for metals, such as ferrum (“iron”).
- Suffix used to form verbal nouns.