Learn Turkish: Bu kedinin rengi çok güzel. - The color of this cat is very beautiful.

The base word is kedi (cat). To say "the cat's" or "of the cat", we add the genitive suffix -in. However, Turkish generally doesn't allow two vowels to be right next to each other. Because kedi ends in a vowel, we have to insert the buffer letter -n-, making it kedi-n-in (kedinin).

Why does the word for color (renk) have an -i at the end?

When connecting two nouns like "the cat's color" in Turkish, both words get a suffix. The owner gets the genitive suffix (kedinin), and the owned object gets a possessive suffix. The -i at the end of rengi is the 3rd person singular possessive suffix, meaning "its". The phrase literally translates to "of the cat, its color."

The dictionary says "color" is renk. Why is there a "g" in rengi?

This happens because of a rule called consonant mutation. When a word ends in a hard consonant like k, and you add a suffix that starts with a vowel (like the possessive -i), the k softens to make it easier to say. Here, the k in renk changes to a g, turning it into rengi.

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