Every word has a story to tell. Take the word companion. Did you know it comes from a Latin word that has the literal sense of "one who breaks bread with another?" Or consider the word silly. Its original sense was "blessed." Then there are words like transfer or provide, whose roots appear all over English vocabulary, from odoriferous to clairvoyance.
But then there are words whose origins are just utterly obscure. These are often everyday words—those humble syllables we use all the time but which we don't always stop to consider. Like dog, which is where we begin this slideshow dedicated to words of mysterious etymology.