How Do You Spell SEY?
Pronunciation: [sˈe͡ɪ] (IPA) 
The word "Sey" is a German term that is pronounced as [ze]. It is spelled with an "S" because German orthography has a specific rule about the pronunciation of the letter "S." In German, "S" is pronounced as [z] when it appears between vowels, while it has a sharp "S" sound at the beginning and end of words. Thus, "Sey" is spelled with an "S" because it is pronounced with a [z] sound due to the vowel sound following it.
