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