boil down

boil down (http://definr.com/boil down)

     v 1: be the essential element; "The proposal boils down to a
          compromise" [syn: reduce, come down]
     2: be cooked until very little is left; as of sauces; "The
        sauce should reduce to one cup" [syn: reduce, decoct,
        concentrate]
     3: cook until very little liquid is left, as of sauces; "The
        cook reduced the sauce by boiling it for a long time"
        [syn: reduce, concentrate]