swing = kołysać, machać czymś (tam i z powrotem)

Old Swing Made Out Of An Old Car Tire Swinging In The Wind On A ...

Source: http://www.shutterstock.com/video/clip-15645430-stock-footage-old-swing-made-out-of-an-old-car-tire-swinging-in-the-wind-on-a-beach-symbol-of-lost-childhood-and.html

kołysać, machać czymś (tam i z powrotem)

swing = kołysać, machać czymś (tam i z powrotem)

English sentence and Polish translation

He was swinging his legs from side to side. = On kołysał nogami z boku na bok.