Mondays are for etymology
Here's an interesting thing I learned today: you know how you're told to murmur "rhubarb? rhubarb, rhubarb!" to imitate the sounds of a fake conversation? Apparently, the word rhubarb comes from "Rho Barbaron", which in Greek means "the barbarian river". And barbarians were so called because the Greeks though that a lot of barbarians talking sounded like "bar bar bar".