Shoehorn (noun)

A tool, typically made of plastic or metal, used to help insert the foot into a tight-fitting shoe by holding the back of the shoe open while the foot is inserted.

Origin:

From shoe + horn.

Examples:

1. He used a shoehorn to put on his shoes.
2. The shoehorn made it easier to put on the tight-fitting shoes.
3. A shoehorn can be used to prevent damage to the back of shoes.
4. A shoehorn is a handy tool for people with limited mobility.
5. A shoehorn can be made of plastic, metal, or even bone.