| M SG | M PL | F SG | F PL | N SG | N PL | |
| NOM | ? (rule) | imperiosī (rule) | imperiosa (rule) | ? (rule) | imperiosum (rule) | imperiosī (rule) |
| GEN | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) |
| DAT | ? (rule) | ? (rule) | ? (rule) | imperiosīs (rule) | ? (rule) | imperiosīs (rule) |
| ACC | imperiosum (rule) | ? (rule) | ? (rule) | ? (rule) | imperiosum (rule) | imperiosī (rule) |
| ABL | imperiosō (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) | imperiosīs (rule) |
| VOC | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) |