Fromcastană(“chestnut”) +-iu.
castaniu m orn (feminine singularcastanie,pluralcastanii)
| singular | plural | |||||||
|---|---|---|---|---|---|---|---|---|
| masculine | neuter | feminine | masculine | neuter | feminine | |||
| nominative- accusative | indefinite | castaniu | castanie | castanii | castanii | |||
| definite | castaniul | castania | castaniii | castaniile | ||||
| genitive- dative | indefinite | castaniu | castanii | castanii | castanii | |||
| definite | castaniului | castaniei | castaniilor | castaniilor | ||||