1. Cobbled streets run down to a tiny harbor.
2. Jennifer had been harboring the hots for her gym instructor, Alex.
3. My parents always caution me against taking risks, but I remind them that a ship in a harbor is safe, but that is not what a ship is for, and that I need to venture outside of my comfort zone to achieve my true potential.
4. All aircraft carriers and heavy cruisers have departed harbor.