| Singular | Plural | |
|---|---|---|
| Nominativ | inbecillus, inbecilla, inbecillum, inbecillaque | inbecillaque, inbecilla, inbecilli, inbecillae |
| Genitiv | inbecilli, inbecilli, inbecillae | — |
| Dativ | inbecillo, inbecillo, inbecilloque, inbecilloque, inbecillae | inbecillis |
| Akkusativ | inbecillam, inbecillum, inbecillum | inbecillaque, inbecillas, inbecilla, inbecillos |
| Ablativ | inbecilla, inbecillo, inbecillo, inbecilloque, inbecilloque, inbecillaque | inbecillis |
| Vokativ | inbecilla, inbecille, inbecillum, inbecillaque | inbecillaque, inbecilla, inbecilli, inbecillae |
| Singular | Plural | |
|---|---|---|
| Nominativ | inbecillior | inbecilliores, inbecilliora |
| Genitiv | inbecillioris, inbecillioris | — |
| Dativ | inbecilliori | inbecillioribus |
| Akkusativ | inbecilliorem | inbecilliores, inbecilliora |
| Ablativ | inbecilliori | inbecillioribus |
| Vokativ | inbecillior | inbecilliores, inbecilliora |
| Singular | Plural | |
|---|---|---|
| Nominativ | inbecillissima | inbecillissima |
| Genitiv | — | — |
| Dativ | — | inbecillissimis |
| Akkusativ | — | inbecillissima |
| Ablativ | inbecillissima | inbecillissimis |
| Vokativ | inbecillissima | inbecillissima |
| Grundform | |
|---|---|
| Positiv | inbecille |
| Komparativ | — |
| Superlativ | — |