| Singular | Plural | |
|---|---|---|
| Nominativ | inrationabile | inrationabilia |
| Genitiv | inrationabilis | inrationabilium, inrationabilum |
| Dativ | inrationabili, inrationabilierrore, inrationabile | inrationabilibus |
| Akkusativ | inrationabile | inrationabilia |
| Ablativ | inrationabile, inrationabili, inrationabilierrore | inrationabilibus |
| Vokativ | inrationabile | inrationabilia |