Etymology
From Middle English bocstaff (“letter, written character”), from Old English bōcstæf (“letter, written symbol”), from Proto-West Germanic *bōkstab, from Proto-Germanic *bōkstabaz (“beechwood staff; written character”). Cognate with Saterland Frisian Boukstäf, Dutch boekstaaf, German Low German Bookstaav, German Buchstabe, Danish bogstav, Swedish bokstav, Norwegian Bokmål bokstav, Norwegian Nynorsk bokstav, Faroese bókstavur, Icelandic bókstafur. Likely a semirevival of the Old English term. By surface analysis, book + staff.