rietta + -as, probably related to Karelian rietta (“dirt, waste; rheum”); compare also Ingrian retu (“mud”), Veps redu (“dirt, mud”).
rietas (comparative riettaampi, superlative riettain)
| Inflection of rietas (Kotus type 41*C/vieras, tt-t gradation) | |||
|---|---|---|---|
| nominative | rietas | riettaat | |
| genitive | riettaan | riettaiden riettaitten | |
| partitive | rietasta | riettaita | |
| illative | riettaaseen | riettaisiin | |
| singular | plural | ||
| nominative | rietas | riettaat | |
| accusative | nom. | rietas | riettaat |
| gen. | riettaan | ||
| genitive | riettaan | riettaiden riettaitten rietasten rare | |
| partitive | rietasta | riettaita | |
| inessive | riettaassa | riettaissa | |
| elative | riettaasta | riettaista | |
| illative | riettaaseen | riettaisiin riettaihin rare | |
| adessive | riettaalla | riettailla | |
| ablative | riettaalta | riettailta | |
| allative | riettaalle | riettaille | |
| essive | riettaana | riettaina | |
| translative | riettaaksi | riettaiksi | |
| abessive | riettaatta | riettaitta | |
| instructive | — | riettain | |
| comitative | — | riettaine | |