-sun

== Turkish == === Suffix === -sun Suffix of verb "to be" for subject "you" (informal). Mutlusun. ― You are happy. ==== Usage notes ==== It's used when the word's last vowel is one of "o" or "u". It could be "-sün", "-sin", "-sın" according to the last vowel of the word. While talking about you (plural) or you (formal), it becomes "-sunuz"