From Proto-Finnic *onnët'oin, equivalent to onni (“happiness, luck”) + -ton (“-less”).
onneton (comparative onnettomampi, superlative onnettomin)
"about" is expressed with the elative case.
| Inflection of onneton (Kotus type 34*C/onneton, tt-t gradation) | |||
|---|---|---|---|
| nominative | onneton | onnettomat | |
| genitive | onnettoman | onnettomien | |
| partitive | onnetonta | onnettomia | |
| illative | onnettomaan | onnettomiin | |
| singular | plural | ||
| nominative | onneton | onnettomat | |
| accusative | nom. | onneton | onnettomat |
| gen. | onnettoman | ||
| genitive | onnettoman | onnettomien onnetonten rare | |
| partitive | onnetonta | onnettomia | |
| inessive | onnettomassa | onnettomissa | |
| elative | onnettomasta | onnettomista | |
| illative | onnettomaan | onnettomiin | |
| adessive | onnettomalla | onnettomilla | |
| ablative | onnettomalta | onnettomilta | |
| allative | onnettomalle | onnettomille | |
| essive | onnettomana | onnettomina | |
| translative | onnettomaksi | onnettomiksi | |
| abessive | onnettomatta | onnettomitta | |
| instructive | — | onnettomin | |
| comitative | — | onnettomine | |