-ono

Unclear; perhaps the ending of Italian frazione and German Fraktion, or related to the suffix of Polish poł-owina and Russian пол-овина (pol-ovina) 'half' (and similar fractions).

• IPA^(key): /ˈono/
• Rhymes: -ono
• Syllabification: o‧no

-ono

1. Marks fractions.

   ‎kvar (“four”) + ‎-ono → ‎kvarono (“a quarter, a fourth”)

   ‎du (“two”) + ‎-ono → ‎duono (“a half”)

2. (organic chemistry) -one
3. (physics) -on

-ono

1. used with a stem to form the third-person plural present of regular -ere verbs and those -ire verbs that don't take -isc-.