| Singular | Plural | |
|---|---|---|
| Nominativ | insidiosus, insidiosa, insidiosum | insidiosae, insidiosi, insidiosa |
| Genitiv | insidiosae, insidiosi, insidiosi | insidiosarum, insidiosorum, insidiosorum |
| Dativ | insidiosae, insidioso, insidioso | insidiosis |
| Akkusativ | insidiosam, insidiosum, insidiosum | insidiosa, insidiosas, insidiosos |
| Ablativ | insidioso, insidioso, insidiosa | insidiosis |
| Vokativ | insidiose, insidiosa, insidiosum | insidiosae, insidiosi, insidiosa |
| Singular | Plural | |
|---|---|---|
| Nominativ | insidiosior | — |
| Genitiv | — | — |
| Dativ | — | — |
| Akkusativ | — | — |
| Ablativ | — | — |
| Vokativ | insidiosior | — |
| Singular | Plural | |
|---|---|---|
| Nominativ | — | — |
| Genitiv | — | — |
| Dativ | insidiosissimo, insidiosissimo | — |
| Akkusativ | — | — |
| Ablativ | insidiosissimo, insidiosissimo | — |
| Vokativ | — | — |