PoloAt today’s Olympics, polo is a water sport; its original form, played on horseback, left the program after the 1936 games. The Greeks threw diskos, while the Romans threw discus, which is the immediate source of the English word, by 1581. Could scull be related to skull, a word it looks and sounds so much like? Freestyle rapping emerged as a term in the early 1980s, whereas freestyle swimming goes all the way back the 1910s. The earliest known freestyle reference, according to the Oxford English Dictionary made its first splash, actually, in reference to discus-throwing.