The word "fessler" is a surname that is typically spelled with two "s"s, and pronounced /ˈfɛslər/. The first syllable, "fess," is pronounced with a short e sound and a soft s sound. The second syllable, "ler," is pronounced with a short e sound and a hard s sound. The word may be difficult to spell for some due to the double "s" and the uncommon combination of sounds. However, with practice and attention to pronunciation, the spelling of "fessler" can be easily mastered.