Ok, so the word "pistol" has a fascinating etymology.
In English it comes from French "pistole", which comes from German "pistole," which originates from Czech "pišt'ala" meaning "whistle" (like a tin whistle or flute).
But in Czech the word for "pistol" is not "pišt'ala." It is, in fact, "pistole." This is a borrow word from either French of Italian "pistole," which comes from German, which comes from Czech "pišt'ala." In effect, the Czech word for "pistol" is a borrow-word-twice-removed from Czech.