Etymology

       In  roguelikes  (https://en.wikipedia.org/wiki/Roguelike),  items  made by the elves have a reputation of
       high quality.  These are usually called elven items, but "elvish" was chosen because it ends with "sh", a
       long  tradition of Unix shells.  It also rhymes with fish (https://fishshell.com), one of the shells that
       influenced the philosophy of Elvish.

Stylization

       The word "Elvish" should be capitalized like a proper  noun.   However,  when  referring  to  the  elvish
       command, use it in lower case with fixed-width font (like in this sentence).

Related Words

       The adjective for Elvish (as in "Pythonic" for Python, "Rubyesque" for Ruby) is Elven.

       Whoever  practices  the Elvish way is called an Elf.  The GitHub organization (https://github.com/elves/)
       is called Elves for this reason.