Learn Turkish: Lokantanın sahibi hasta. - The owner of the restaurant is sick.

The genitive suffix means 'of' or '''s'. Its basic form is -ın, -in, -un, or -ün depending on vowel harmony. Because lokanta ends in a vowel, we need a buffer consonant to stop two vowels from crashing together. For the genitive case, that buffer letter is always n, making it -nın.

Why does sahip have an -i at the end in this sentence?

In Turkish, when you link two nouns to say 'the X of the Y', both words get a suffix. The first word gets the genitive suffix (lokantanın, 'of the restaurant'), and the second word must get a possessive suffix to show it belongs to the first one. Here, the -i on sahibi acts like 'its', completing the grammatical link.

The dictionary says 'owner' is sahip. Why is it spelled with a b (sahibi)?

This happens because of a rule called consonant softening. When a Turkish word ends in a hard letter like p, t, k, or ç, and you add a suffix starting with a vowel (like the possessive -i), that hard letter often changes to a softer one so it is easier to say. Here, the hard p softens into a b.

Where is the word for 'is' in this sentence?