The switch from “w” to “f” came with the Romans, who copied the Etruscan alphabet shortly before 600 B.C. The Romans made adjustments on letter number 6: They assigned the “w” sound to their letter U as a secondary job, and, thus enabled, they gave the F-shape letter a brand-new sound—the strong Latin fricative not adequately represented among the Etruscan letters, the sound “f.”