Focus on the pronunciation of double
English definition of “double”
› [I] to become twice as much or as many: Some share prices can double in 12 months.double in size/price/value He reckons the company can double in size over the next five years. Production more than doubled from 4 million to 8.5 million per year in three years.
› [T] to make something twice as much or many: She is unlikely to accept, even though the offer would double her salary. Strong car sales more than doubled the company's profits in the first quarter.