Turkish

Suffix

-sunuz

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

   Yorgunsunuz.‎ ― You are tired.

Usage notes

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