Turkish

Suffix

-sınız

1. Suffix of verb "to be" for subject "you" (formal or plural).

   Yavaşsınız.‎ ― You are slow.

Usage notes

• It's used when the word's last vowel is one of "a" or "ı".
• It could be "-sunuz", "-siniz", "-sünüz" according to the last vowel of the word.
• While talking about you (singular) or you (informal), it becomes "-sın"