The answer to "neck is to scarf" is "waist is to belt." Just as a scarf is worn around the neck, a belt is worn around the waist.
A waist chain is an ornamental chain worn around the waist, seen by some as a symbol of slavery.
rope...?
A waistcloth is a cloth or garment worn around the waist.
Is a belt
A blouson is a tight garment worn around the waist with blousing over the waistband.
Cummerbund
It is called a cincture.
The fabric is called a "wrapper" or "lappa" and it is a traditional piece of clothing worn by women in various African countries. It is typically worn as a skirt or around the waist in a stylish and elegant manner.
No, tallitot (pl) are prayer shawls that are worn on the shoulders or covering the person's head and shoulders.
Lungi
A waistbelt is a belt or strap worn around the waist, especially as part of a larger article such as a backpack.