Cast Off in this context refers to the deliberate action of releasing, dismissing, or freeing oneself from a particular constraint, restriction, responsibility, or association. It may involve liberating oneself from physical constraints such as discarding unnecessary belongings, or emotional ties such as ending a relationship or friendship. Alternatively, it could be the process of rejecting or distancing oneself from limiting beliefs, stereotypes, or societal norms. It is often associated with the pursuit of freedom, change, or personal growth.

1. During their sailing trip, he had to cast off the boat to start their adventure. 2. She decided to finally cast off her old, painful memories to invite happiness back into her life. 3. The crew quickly cast off the heavy cargo to prevent the plane from crashing. 4. To advance in her career, she knew she had to cast off her fear of public speaking. 5. After several months of therapy, he was able to cast off his negative notions about himself.

"Cast off" in the context of letting go has a fascinating nautical history. The term originated in the world of sailing during the middle ages. When a sailor would "cast off," they were releasing the ropes or lines that moored a sailing vessel to the dock, thus 'letting go' and enabling the ship to set sail on its journey. Over time, the term has evolved and been adopted into general use, symbolizing the act of moving forward by letting go of something holding back. Isn't it interesting to observe how terminologies transition from specific professions into everyday use?