Part of traditional attire worn by religious Jewish men, usually after marriage. Photo from. https://en.wikipedia.org. Photo credit: By Shuki – Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1238442.
In Yiddish, ceremonial robe for men.
The same word describes the top part of a military or law enforcement uniform with a stiff high collar that is called tunic in English.