Harper's Etymonline about first meaning: early 14c., "read letter by letter, write or say the letters of;" c. 1400, "form words by means of letters," apparently a French word that merged with or displaced a native Old English one; both are from the same Germanic root, but the French word had evolved a different sense. The native word is Old English spellian "to tell, speak, discourse, talk," from Proto-Germanic *spellam (source also of Old High German spellon "to tell," Old Norse spjalla, Gothic spillon "to talk, tell"). But the current senses seem to come from Anglo-French espeller, Old French espelir "mean, signify, explain, interpret," also "spell out letters, pronounce, recite," from Frankish *spellon "to tell" or some other Germanic source, ultimately identical with the native word. Second meaning in Harper's Etymonline: Old English spell "story, saying, tale, history, narrative, fable; discourse, command," from Proto-Germanic *spellam. Compare Old Saxon spel, Old Norse spjall, Old High German spel, Gothic spill "report, discourse, tale, fable, myth;" German Beispiel "example." From c. 1200 as "an utterance, something said, a statement, remark;" meaning "set of words with supposed magical or occult powers, incantation, charm" first recorded 1570s; hence any means or cause of enchantment. The term 'spell' is generally used for magical procedures which cause harm, or force people to do something against their will -- unlike charms for healing, protection, etc. ["Oxford Dictionary of English Folklore"] In general terms, the belief underlying the use of spells is that the wish that they embody will be fulfilled, regardless of its goodness or badness, so long as the formula has been correctly pronounced. Broadly speaking, then, spell and prayer, like magic and religion to which they severally belong, can be distinguished by the nature of the intended purpose. [Enyclopaedia Britannica, 1941] Also in Old English, "doctrine; a sermon; religious instruction or teaching; the gospel; a book of the Bible".