| Singular | Plural | |
|---|---|---|
| Nominativ | inane | autinania, inania |
| Genitiv | huinanis, inanis, inanissima, inanissimi, inanissimis | inanum, inanium |
| Dativ | inaniora, inanique, inane, inani, inaniter | inanibus |
| Akkusativ | inane | autinania, inania |
| Ablativ | inane, inaniora, inanique, inani, inaniter | inanibus |
| Vokativ | inane | autinania, inania |