noun
tumbrel
TUM-brul/ˈtʌmbrəl/
A two-wheeled cart for carrying loads.
A horse pulls a two-wheeled tumbrel carrying prisoners toward the guillotine.

Etymology
The ancestor named a cart designed to tip backward and dump its load. Such carts became notorious for carrying condemned prisoners to the guillotine, giving the word its execution-related sense.
In context
The gibbet on the Grève, you know it? it stands always ready. It is horrible! to see you ride in that tumbrel!