drape
Definitions
To arrange, hang, or cover something with fabric in a loose or casual way.
To cover or adorn something with a cloth or other material.
A long, heavy curtain or hanging fabric used for decoration or to block light.
Examples
She decided to drape a silk scarf over the back of the armchair to add a touch of color.
The heavy velvet curtains drape elegantly from the ceiling to the floor.