double back

:  having a twofold relation or character :  dual

:  consisting of two usually combined members or parts

:  being twice as great or as many

:  to make twice as great or as many: such as

:  to increase by adding an equal amount

:  to amount to twice the number of

:  to twice the extent or amount

:  two together

:  downward and forward from the usual position

:  something twice the usual size, strength, speed, quantity, or value: such as

:  a double amount

:  a base hit that enables the batter to reach second base

:  the rear part of the human body especially from the neck to the end of the spine

:  the body considered as the wearer of clothes

:  capacity for labor, effort, or endurance

:  to, toward, or at the rear

:  in or into the past :  backward in time

:  ago

:  being at or in the back

:  distant from a central or main area

:  articulated at or toward the back of the oral passage :  formed deep within the mouth

:  to support by material or moral assistance

:  substantiate

:  to assume financial responsibility for