-онный

Etymology

Apparently extracted from -ion + -ный (-nyj).

Pronunciation

• IPA^(key): [ˈonːɨj]

Suffix

-о́нный • (-ónnyj)

1. -ional, etc. (forms adjectives, especially attributive adjectives, from nouns ending in -ия (-ija, “-ion”), especially -ция (-cija, “-tion”))

   цивилиза́ция (civilizácija, “civilization”) → цивилизацио́нный (civilizaciónnyj, “civilization (attributive); civilizational”)

   вентиля́ция (ventiljácija, “ventilation”) → вентиля́цио́нный (ventiljációnnyj, “ventilation (attributive)”)

   адге́зия (adgézija, “adhesion”) → адгезио́нный (adgeziónnyj, “adhesive”)