starke deklination

listen to the pronunciation of starke deklination
Немецкий Язык - Английский Язык
strong declension
A class of words in many Germanic languages including English, which inflect or conjugate irregularly rather than by suffixation; as, for the sake of example, in the case of the noun goose (the plural of which is geese) and the verb sing (the past form of which is sang, and the past participle form of which is sung)