| SgM | SgF | SgN | PlM | PlF | PlN | |
| Nom | ráðsnjallr | ráðsnjull (rule) | ráðsnjallt (rule) | ráðsnjallir (rule) | ráðsnjallar (rule) | ráðsnjull (rule) |
| Acc | ráðsnjallan (rule) | ráðsnjalla (rule) | ráðsnjallt (rule) | ráðsnjalla (rule) | ráðsnjallar (rule) | ráðsnjull (rule) |
| Dat | ráðsnjullum (rule) | ráðsnjallli (rule) | ráðsnjullu (rule) | ráðsnjullum (rule) | ráðsnjullum (rule) | ráðsnjullum (rule) |
| Gen | ráðsnjalls (rule) | ráðsnjalllar (rule) | ráðsnjalls (rule) | ráðsnjallla (rule) | ráðsnjallla (rule) | ráðsnjallla (rule) |
| SgM | SgF | SgN | Pl | |
| Nom | ráðsnjalli (rule) | ráðsnjalla (rule) | ráðsnjalla (rule) | ráðsnjullu (rule) |
| Acc | ráðsnjalla (rule) | ráðsnjullu (rule) | ráðsnjalla (rule) | ráðsnjullu (rule) |
| Dat | ráðsnjalla (rule) | ráðsnjullu (rule) | ráðsnjalla (rule) | ráðsnjullum (rule) |
| Gen | ráðsnjalla (rule) | ráðsnjullu (rule) | ráðsnjalla (rule) | ráðsnjullu (rule) |
| Degree | |
| Comp | ráðsnjallari (rule) |
| Sup | ráðsnjallastr (rule) |