example. The risorius is a facial muscle that helps make us smile. By breaking down parts of the word, you can create an association. In this case, “Risorius” sounds like “Why-So-serious?” famously spoken by the Joker from the Batman series. And what better way to memorize the function of the risorius, than to picture that wide crimson grin from the Joker, himself. Having this image implanted in your mind whenever the word risorius pops up will guarantee that you never forget it.