A dreidel (Hebrew: סביבון, Sevivon) is a four-sided top, played with during the Jewish
holiday of Hanukkah. The dreidel is used for a gambling game similar to Teetotum.
Each side of the dreidel bears a letter of the Hebrew alphabet: נ (Nun), ג (Gimel), ה
(Hei), ש (Shin), which together form the acronym for "נס גדול היה שם" (Nes Gadol Haya
Sham – "a great miracle happened there"). These letters also form a mnemonic for the
rules of a gambling game played with a dreidel: Nun stands for the Yiddish word "nit"
('nothing'), hei stands for "halb" ('half'), gimel for "gants" ('all'), and shin for "shteln" ('put').
In Israel, instead of ש (Shin), the letter פ (Pe) is written to symbolize the location of the
miracle — "פה" (Po – "here").
The Yiddish word "dreydl" comes from the word "dreyen" ("to turn"). The Hebrew word
"sevivon" comes also from the root "sov" ("turn") and was invented by Itamar Ben-Avi
(the son of Eliezer Ben-Yehuda) when he was 5 years old. Before that, different terms
were used by Hayyim Nahman Bialik in his poems. [citation needed] While the only
mandated mitzvot for Chanukah consist of lighting candles and saying the full hallel, there
are numerous other customs that have come to be associated with Chanukah.
Hanukkah Menorah.com