pedal / peddle are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
pedal: (noun) a lever that is operated with the foot. (verb) operate the pedals on a keyboard instrument. (adjective) of or relating to the feet.
peddle: (verb) sell or offer for sale from place to place.
pedal: p·EH·d·ah·l
peddle: p·EH·d·ah·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)