cast off
US /kæst ˈɔːf/
UK /kæst ˈɔːf/
1.
to get rid of something or someone that is no longer wanted or needed
:
•
The snake cast off its old skin.
•
They cast off their old beliefs and embraced new ideas.
2.
to untie a boat from its moorings and set sail
:
•
The crew prepared to cast off at dawn.
•
Once the lines were clear, they cast off from the dock.