pedal

(noun) a sustained bass note. Synonyms: pedal point.

(noun) a lever that is operated with the foot. Synonyms: treadle, foot pedal, foot lever.

(verb) ride a bicycle. Synonyms: bicycle, cycle, bike, wheel.

(verb) operate the pedals on a keyboard instrument.

(adj) of or relating to the feet. Example: "The word for a pedal extremity is `foot'."