To swage means to shape or reduce the diameter of a metal object by forcing it through a die.
Swaging is a process used in metalworking to make metal parts the right shape and size.
Examples:
The blacksmith swaged the metal into a new shape.
I need to swage this metal rod to make it thinner.
She used a machine to swage the metal into a smaller size.
The blacksmith swaged the metal and made it sing!
He swaged the metal so much, it became as thin as paper.
The blacksmith's arms were so strong, he could swage metal all day long.