Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | effĭcax |
| Gen. | efficacis |
| Dat. | efficaci |
| Acc. | efficacem |
| Abl. | efficaci |
| Voc. | effĭcax |
| PLURIEL |
| Nom. | efficaces |
| Gen. | efficacĭum |
| Dat. | efficacĭbus |
| Acc. | efficaces |
| Abl. | efficacĭbus |
| Voc. | efficaces |
| SINGULIER |
| Nom. | effĭcax |
| Gen. | efficacis |
| Dat. | efficaci |
| Acc. | efficacem |
| Abl. | efficaci |
| Voc. | effĭcax |
| PLURIEL |
| Nom. | efficaces |
| Gen. | efficacĭum |
| Dat. | efficacĭbus |
| Acc. | efficaces |
| Abl. | efficacĭbus |
| Voc. | efficaces |
| SINGULIER |
| Nom. | effĭcax |
| Gen. | efficacis |
| Dat. | efficaci |
| Acc. | effĭcax |
| Abl. | efficaci |
| Voc. | effĭcax |
| PLURIEL |
| Nom. | efficacĭa |
| Gen. | efficacĭum |
| Dat. | efficacĭbus |
| Acc. | efficacĭa |
| Abl. | efficacĭbus | |