CAST LOOSE

To unfasten; untie; let loose (as a rope holding a boat). * /The captain of the boat cast off the line and we were soon out in open water./ 1b. To untie a rope holding a boat or something suggesting a boat. * /We cast off and set sail at 6 A.M./ 2. To knit the last row of stitches. * /When she had knitted the twentieth row of stitches she cast off./ 3. To say that you do not know (someone) any more; not accept as a relative or friend. * /Mr. Jones cast off his daughter when she married against his wishes./