Today’s word, copacetic, is a favorite of mine. Although I too often forget to use it.
Copacetic is an adjective meaning completely or entirely satisfactory. I think its connotation is much more positive then satisfactory. For example if a boss told me my work was satisfactory I would be concerned it wasn’t very good, that it was barely above unsatisfactory. But if they described the situation or my projects as copacetic I would be much happier.
The etymology of copacetic is murky at best. Bartelby, Merriam-Webster and Dictionary.com all list the etymology as unknown. Word-detective.comand Etymonline.com both take a stab at the etymology noting it emerged in America around the end of the 19th century. Both sources suggest it has its roots in America’s African American culture.