Related Clues:

• Undoes
• Frees
• Lets loose
• Loosens, in a way
• Sets free
• Sets loose
• Loosens
• Removes, as a knot
• Frees, in a way
• Frees from one's bonds
• Undoes a knot
• Undoes, loosens a knot
• Undoes knot
• Opens knot to release
• A loosens like this to a relative extent