The word pun is, in some obscure way, related to the word punctilious. The argument runs that there was this Latin verb, pungere, which meant "to prick." From that the Italian noun punto meaning "point", was begat, the diminutive of which is puntilglio which means "a fine point." And both pun and punctilious are descended from puntiglio ... or so the argument goes. Get the point?