"Cut the Gordian knot" is an idiom that refers to a bold and decisive action taken to solve a complicated problem. To express this concept differently, one can use a variety of synonyms such as "solve a dilemma," "crack the code," "untangle a mess," "resolve a conundrum," "break through a deadlock," "overcome an impasse," "find a way out," "break the barrier," "smash the obstacle," or "break the mold." All of these phrases imply taking a bold and courageous step to overcome a challenging situation. So, the next time you encounter a tough problem, remember that there are always different ways to say "cut the Gordian knot".