mixed declension

noun3

1. •
   The declension pattern for attributive adjectives that follow the indefinite article ein, the negative article kein, and possessive determiners such as mein and dein.
2. •
   The declension pattern for masculine and neuter nouns that have -en in the plural but -s, -es, or -ens in the genitive singular.
3. •
   A subtype of the third declension with -ium in the genitive plural.