Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | quartusdecimus |
| Gen. | quartusdecimi |
| Dat. | quartusdecimo |
| Acc. | quartusdecimum |
| Abl. | quartusdecimo |
| Voc. | quartusdecime |
| PLURIEL |
| Nom. | quartusdecimi |
| Gen. | quartusdecimōrum |
| Dat. | quartusdecimis |
| Acc. | quartusdecimos |
| Abl. | quartusdecimis |
| Voc. | quartusdecimi |
| SINGULIER |
| Nom. | quartusdecimă |
| Gen. | quartusdecimae |
| Dat. | quartusdecimae |
| Acc. | quartusdecimam |
| Abl. | quartusdecimā |
| Voc. | quartusdecimă |
| PLURIEL |
| Nom. | quartusdecimae |
| Gen. | quartusdecimārum |
| Dat. | quartusdecimis |
| Acc. | quartusdecimas |
| Abl. | quartusdecimis |
| Voc. | quartusdecimae |
| SINGULIER |
| Nom. | quartusdecimum |
| Gen. | quartusdecimi |
| Dat. | quartusdecimo |
| Acc. | quartusdecimum |
| Abl. | quartusdecimo |
| Voc. | quartusdecimum |
| PLURIEL |
| Nom. | quartusdecima |
| Gen. | quartusdecimōrum |
| Dat. | quartusdecimis |
| Acc. | quartusdecima |
| Abl. | quartusdecimis | |