Most common:
* ניי (pronounced "nay") - This is the most common way to say "new" in Yiddish.
* פריש (pronounced "fresh") - This word literally means "fresh" but is often used as a synonym for "new," especially when referring to food.
Other options:
* נייע (pronounced "n'yeyeh") - This is the feminine form of "ניי" and is used when referring to a new thing that is feminine in Yiddish.
* נייער (pronounced "n'yeyer") - This is the masculine form of "ניי" and is used when referring to a new thing that is masculine in Yiddish.
* נייעס (pronounced "n'yeyes") - This means "news" and can sometimes be used to mean "new" in a general sense.
The best way to choose the right word will depend on the specific context.