+--------+---------------------+------------------------+
| | Singular. | Plural. |
+--------+---------------------+------------------------+
| | MASC. FEM. NEUT. | MASC. FEM. NEUT. |
| _Nom._ | ūnus ūna ūnum | ūnī ūnae ūna |
| _Gen._ | ūnīus ūnīus ūnīus | ūnōrum ūnārum ūnōrum |
| _Dat._ | ūnī ūnī ūnī | ūnīs ūnīs ūnīs |
| _Acc._ | ūnum ūnam ūnum | ūnōs ūnās ūna |
| _Abl._ | ūnō ūnā ūnō | ūnīs ūnīs ūnīs |
| _Voc._ | ūne | |
+--------+---------------------+------------------------+
In verse, the genitive singular is often #ūnius#.