He will not confirm or deny the allegations. She denied knowing the whereabouts of the hidden treasure. He denied the allegations against him in court.
He asked me to give him another loan, but I refused. He's in trouble but he's refused all (my offers of) help. On cold mornings the car always refuses to start. The local council refused him planning permission to build an extra bedroom.
the global economy the German/US economy This can be done by machines with more speed and economy. She writes with such economy - I've never known a writer say so much in so few words.
the system of trade and industry by which the wealth of a country is made and used
the intentional saving of money or, less commonly, the saving of time, energy, words, etc.:
economics
I'm afraid my grasp of economics is rather limited. Shelley is taking economics at university. Both their children graduated with degrees in economics.