tumbril
/ˈtʌmbrəl/(亦作tumbrel)
noun
1- historical an open cart that tilted backwards to empty out its load, in particular one used to convey condemned prisoners to the guillotine during the French Revolution〈史〉（尤指法国革命时期押送犯人去断头台的）翻卸式无篷车。
1.1
- a two-wheeled covered cart which carried tools or ammunition for an army军用两轮篷车（用来运输工具、弹药）。
词源
Middle English （originally denoting a type of cucking-stool）： from Old French tomberel, from tomber 'to fall'.