| Adverb Positiv | sincere, sinceriter | 
| Adverb Komparativ | sincerius | 
| Adverb Superlativ | sincer‑issim‑e | 
| mask. | fem. | neutr. | |
|---|---|---|---|
| Nom. Sg. | sincer‑us | sincer‑a | sincer‑um | 
| Gen. Sg. | sincer‑i | sincer‑ae | sincer‑i | 
| Dat. Sg. | sincer‑o | sincer‑ae | sincer‑o | 
| Akk. Sg. | sincer‑um | sincer‑am | sincer‑um | 
| Abl. Sg. | sincer‑o | sincer‑a | sincer‑o | 
| Nom. Pl. | sincer‑i | sincer‑ae | sincer‑a | 
| Gen. Pl. | sincer‑orum | sincer‑arum | sincer‑orum | 
| Dat. Pl. | sincer‑is | sincer‑is | sincer‑is | 
| Akk. Pl. | sincer‑os | sincer‑as | sincer‑a | 
| Abl. Pl. | sincer‑is | sincer‑is | sincer‑is | 
| mask. | fem. | neutr. | |
|---|---|---|---|
| Nom. Sg. | sincer‑ior | sincer‑ior | sincer‑ius | 
| Gen. Sg. | sincer‑ior‑is | sincer‑ior‑is | sincer‑ior‑is | 
| Dat. Sg. | sincer‑ior‑i | sincer‑ior‑i | sincer‑ior‑i | 
| Akk. Sg. | sincer‑ior‑em | sincer‑ior‑em | sincer‑ius | 
| Abl. Sg. | sincer‑ior‑e | sincer‑ior‑e | sincer‑ior‑e | 
| Nom. Pl. | sincer‑ior‑es | sincer‑ior‑es | sincer‑ior‑a | 
| Gen. Pl. | sincer‑ior‑um | sincer‑ior‑um | sincer‑ior‑um | 
| Dat. Pl. | sincer‑ior‑ibus | sincer‑ior‑ibus | sincer‑ior‑ibus | 
| Akk. Pl. | sincer‑ior‑es | sincer‑ior‑es | sincer‑ior‑a | 
| Abl. Pl. | sincer‑ior‑ibus | sincer‑ior‑ibus | sincer‑ior‑ibus | 
| mask. | fem. | neutr. | |
|---|---|---|---|
| Nom. Sg. | sincer‑issim‑us | sincer‑issim‑a | sincer‑issim‑um | 
| Gen. Sg. | sincer‑issim‑i | sincer‑issim‑ae | sincer‑issim‑i | 
| Dat. Sg. | sincer‑issim‑o | sincer‑issim‑ae | sincer‑issim‑o | 
| Akk. Sg. | sincer‑issim‑um | sincer‑issim‑am | sincer‑issim‑um | 
| Abl. Sg. | sincer‑issim‑o | sincer‑issim‑a | sincer‑issim‑o | 
| Nom. Pl. | sincer‑issim‑i | sincer‑issim‑ae | sincer‑issim‑a | 
| Gen. Pl. | sincer‑issim‑orum | sincer‑issim‑arum | sincer‑issim‑orum | 
| Dat. Pl. | sincer‑issim‑is | sincer‑issim‑is | sincer‑issim‑is | 
| Akk. Pl. | sincer‑issim‑os | sincer‑issim‑as | sincer‑issim‑a | 
| Abl. Pl. | sincer‑issim‑is | sincer‑issim‑is | sincer‑issim‑is |