seiner
Translation
his, its, of his, of its
Examples
Er hilft seiner Schwester.
He helps his sister.
Der Titel seines Buches ist lang.
The title of his book is long.
Das ist die Meinung seiner Freunde.
This is the opinion of his friends.
Grammar Patterns
((dative feminine noun)) to his/its ... Er hilft seiner Schwester.
((genitive masculine/neuter noun)) of his/its ... Der Titel seines Buches ist lang.
((genitive plural noun)) of his/its ... Die Meinung seiner Freunde ist wichtig.
Similar Words
meiner, deiner, ihrer, unserer, eurer
Etymology
From Old High German 'sīn'. The '-er' ending marks various cases, including dative feminine ('der') and genitive plural ('der').
Memory Tips
Dative Feminine: 'dER Schwester' -> 'seinER Schwester'. Genitive Plural: 'dER Freunde' -> 'seinER Freunde'. It often matches the definite article.