If something is suppled, it is made softer and more flexible, especially by stretching or bending it.
Suppled things are easier to move and use. It's usually a good thing to be suppled.
Examples:
She suppled the leather by rubbing it with oil.
The dancer's body is suppled and graceful.
The suppled rope was easy to tie.
The suppled rubber band snapped and hit me!
After the exercise, my body felt suppled and relaxed.
The suppled tree branches swayed gently in the wind.