köken: From Middle French chasque, a backformation from chascun, from Old French chascun (whence modern chacun). The Old French derives from a conflation of Vulgar Latin *quiscunus (from quisque unus) with synonymous *catunus (from cata unus, from Ancient Greek κατά (katá), whence Catalan, Spanish, and Portuguese cada). The short vowel (and hence the lack of a circumflex) is due to the usually…