pulley

Pulley comes from Middle English puly or poley, borrowed from Old French poulie, itself from Medieval Latin polidia. That form arose when the plural of neuter polidium was mistaken for a feminine singular, tracing back to Ancient Greek polídion, a 'little pivot,' from pólos ('pivot, hinge, axis') and ultimately the Proto-Indo-European root meaning 'to turn.'

The word's deep root is about turning and pivoting, not pulling — but English speakers, hearing 'pulley' and thinking of ropes being pulled, linked it to the verb pull by folk etymology, even though the two words aren't actually related.