The spelling of the word "fleisher" can be explained using the International Phonetic Alphabet (IPA). The word is pronounced as /ˈfliːʃər/ with the stress on the first syllable. The letter "f" is pronounced as /f/ and "l" as /l/. The diphthong "ei" is pronounced as /i:/ and "sh" as /ʃ/. The last syllable "er" is pronounced as /ər/. Keeping this IPA transcription in mind, spellings of "fleisher" can be easily understood and spelled correctly.
The word "fleisher" is primarily used as a surname, and its etymology can be traced back to multiple origins. One possible origin of the name is from the German language. "Fleisch" means "meat" in German, and the suffix "-er" is commonly used to denote a profession or occupation. Therefore, "fleisher" could be derived from the German word for butcher or someone involved in the meat trade.
Another potential origin is from Yiddish, a language spoken by Ashkenazi Jews. In Yiddish, "fleisher" (also spelled "fleishere" or "fleishman") means "butcher". As many Ashkenazi Jews have historically been involved in the trade of meat, it is plausible that the surname "fleisher" was adopted by individuals associated with this profession.