also charrette, c. 1400, "a chariot, a cart," from Old French charrete "wagon, small cart" (12c.), diminutive of charre, from Latin carrum, carrus "wagon" (see car).
Meaning "a concerted effort by concerned individuals to accomplish a given task by marathon work in a defined, short time" is attested by 1977, originally among architects, from French charette (by 1880s in this sense); it is said to be from the jargon of student architects hurrying to finish their models before they would have to be placed in the charrette which collected them for consideration.
Proto-Indo-European root meaning "to run."
It forms all or part of: car; career; cargo; caricature; cark; carpenter; carriage; carrier; carry; charabanc; charette; charge; chariot; concourse; concur; concurrent; corral; corridor; corsair; courant; courier; course; currency; current; curriculum; cursive; cursor; cursory; discharge; discourse; encharge; excursion; hussar; incur; intercourse; kraal; miscarry; occur; precursor; recourse; recur; succor.
It is the hypothetical source of/evidence for its existence is provided by: Greek -khouros "running;" Latin currere "to run, move quickly;" Lithuanian karšiu, karšti "go quickly;"Old Irish and Middle Welsh carr "cart, wagon," Breton karr "chariot," Welsh carrog "torrent;" Old Norse horskr "swift."