/ˈzmiːɒfkə/
A traditional Czech knitted wool cap with no bill, topped by a small pom-pom, and encircled with a cuff into which a pattern is knitted in which smaller zig-zags are predominated by a large central zig-zag, whose angularity evokes the pattern on the back of the adder (Vipera berus), from which it takes its name.