Loosed for sea is a nautical term used to describe a ship or boat that has been detached from its moorings and set free to sail. There are several synonyms that can be used to describe this movement, such as cast off, untied, unmoored, released, unfastened, and unanchored. These words refer to the action of breaking free from a stable position and moving forward to navigate across the sea. They all imply a sense of freedom and independence, representing the ship's ability to move and explore beyond its previous boundaries. Loosed for sea is a timeless phrase that evokes a sense of adventure and excitement, making it a popular expression among sailors and seafarers.