Focus on the pronunciation of double
English definition of “double”
/ˈdʌb·əl/ adj, adv [not gradable] (TWICE)
› twice the size, amount, price, etc., or consisting of two similar things together: The cost of going to the movies is almost double what it was a few years ago. Fold the blanket double (= so that it is in two layers) and then you won’t be cold. › A double bed is a bed for two people. › If you are seeing double, you are seeing two of everything.