Use 'cast off' when describing getting rid of personal habits or traits.

Personal Change

'Cast off' can be used metaphorically for abstract concepts such as doubt or fear.

Metaphorical Use

In sailing, 'cast off' is an order to free the boat so it can depart.

'Cast off' in nautical terms signifies the start of a voyage or trip.

Use 'cast off' when finishing the last row of a knitting project to secure it.

'Cast off' in knitting refers to a specific method, not general finishing.

'Cast off' often carries a negative emotional weight when speaking about rejection.

Indicates a strong refusal to accept something, often an idea or proposal.