What's the difference between i.e. and e.g.?
mid-14c., charcole, first element is either Old French charbon "charcoal," or, on the current theory, obsolete charren "to turn" (from Old English cerran) + cole "coal," thus, "to turn to coal."
charcoal char·coal (chär'kōl')
Carbon obtained by heating or burning organic material with restricted access of air.