Pedi means feet and hundreds of years ago, the word impediment referred to shackling one's feet. Now its use has broadened considerably. Impediment is something that blocks or impedes your path.
Freebase(0.00 / 0 votes)Rate this definition: Commissary. A commissary is someone delegated by a superior to execute a duty or an office; in a formal, legal context, one who has received power from a legitimate superior authority to pass judgment in a certain cause or to take information concerning it.
I believe that commis is French for assistant. A Commis is a trainee or assistant Chef and the first step on the ladder of Chef 'ranks'. Clearly, once a trainee Chef becomes qualified, s/he would then be addressed as a Commis Chef. Prior to qualification as a Chef, s/he would be just a trainee Chef.