We can refer to the letter ZAYIN as ZIG ZAG ZAYIN. Now, let’s be honest. The term zig zag is a bit of a stretch here because the top line is actually on a diagonal and not so much a zig zag. But, it’s not easy to come up with good alliteration for a letter starting with “z”. Plus, zig zag is catchy. The letter ZAYIN makes a “z” sound like zebra. And again, to clarify, whereas the top line of the letter VAV is short, straight, and horizontal, the top line of the letter ZAYIN is diagonal.