Deklinationen
| Singular | Plural | |
|---|---|---|
| Nominativ | singular sg lacus | plural pl lacus |
| Genitiv | singular sg lacus | plural pl lacuum |
| Dativ | singular sg lacui | plural pl lacubus |
| Akkusativ | singular sg lacum | plural pl lacus |
| Ablativ | singular sg lacu | plural pl lacubus |
| Vokativ | singular sg lacus | plural pl lacus |