What should you add to a clove hitch for extra fastening power when tied for longer periods?

Adding two half hitches to a clove hitch enhances its security and stability, especially when the knot needs to be tied for longer periods. The clove hitch is effective for securing a rope to a post or another object, but over time it may loosen, particularly if the load shifts or if the material is subject to movement.

By incorporating two half hitches, you create additional friction against the standing part of the line. This combination effectively locks the clove hitch in place, preventing it from coming undone or shifting when under strain. Each half hitch wraps around the standing part, providing increased holding power.

In contrast, the other options do not provide suitable enhancements to a clove hitch for extended use. A bowline knot creates a secure fixed loop, a square knot is valuable for tying two ends of rope together, and another clove hitch may not offer significant additional security, as it could still loosen if not properly secured with additional hitches.