($
* ($ ( [word] -- cs-token ) compile-only

takes the execution token of the following word and
saves it on the compile-stack. The correspondig closing
) will then feed it into >COMPILE - so this pair
of word provides you with a prefix-operation syntax
that you may have been seen in lisp-like languages.
   ($ IF ($ 0= A1 @ )) ($ THEN ." hello " )
Note that an opening simple ( paren is a comment.

EXTENSIONS useful immediate primitive