| Singular | Plural | |
|---|---|---|
| Nominativ | inbecillis, inbecille | inbecilles, inbecillia |
| Genitiv | inbecillis | inbecillum |
| Dativ | inbecilli | — |
| Akkusativ | inbecille | inbecillia, inbecillis, inbecilles |
| Ablativ | inbecille, inbecilli | — |
| Vokativ | inbecillis, inbecille | inbecillia, inbecilles |
| Singular | Plural | |
|---|---|---|
| Nominativ | inbecillior | inbecilliora, inbecilliores |
| Genitiv | inbecillioris, inbecillioris | — |
| Dativ | inbecilliori | inbecillioribus |
| Akkusativ | inbecilliorem | inbecilliora, inbecilliores |
| Ablativ | inbecilliori | inbecillioribus |
| Vokativ | inbecillior | inbecilliora, inbecilliores |
| Singular | Plural | |
|---|---|---|
| Nominativ | inbecillissima | inbecillissima |
| Genitiv | — | — |
| Dativ | — | inbecillissimis |
| Akkusativ | — | inbecillissima |
| Ablativ | inbecillissima | inbecillissimis |
| Vokativ | inbecillissima | inbecillissima |