Pitch

Pitch can mean how high or low a sound is, or a field where sports like soccer or cricket are played, or a persuasive talk meant to sell something.

The sound sense comes from Old English 'pic' possibly related to 'point', referring to the 'height' of a tone. The field sense likely comes from 'pitching' or setting up a playing area, while the sales sense relates to 'pitching' an idea forward.