invert
Definitions
To turn upside down or put in the opposite position, order, or arrangement.
To reverse the pitch or interval of a musical melody or chord.
To change a physical or logical state to its opposite, such as a mathematical operation or electrical signal.
Examples
You need to invert the colors of the image to create a negative effect.
The pilot had to invert the plane to perform the daring aerial maneuver.
If you invert the fraction, the calculation becomes much simpler to solve.