Glamour is grammar with one letter worn smooth. In the Middle Ages grammar meant learning in general, and learning, to most people who had none, looked a great deal like magic, so the word slid toward spells. In Scots it became glamour, a charm cast over the eyes, and Walter Scott’s poems carried it south into English. French sent the same root off another way and got grimoire, a book of spells. Only later did glamour go soft and come to mean the shine on a film star. I like that the family stayed together in one sense: grammar is the study of how words are put together, and glamour is what words put together well can make you see that isn’t quite there.