What is the X in X-mas?
French, literally "good" (adj.), from Latin bonus "good" (see bene-). It has crossed the Channel in phrases such as bon apétit (1860), literally "good appetite;" bon-ton (1744) "good style;" bon mot.
language (From "Bonnie", Ken Thompson's wife) A language designed by Ken Thompson and later revised by him to produce B. [When? Features?] (1997-02-04)