step, footboard, backheel
footboard (at the back of a carriage), footman's board
running board, step (of a vehicle)
Слуга стоял на запятках старой кареты.
The servant stood on the footboard at the back of the old carriage.
Мальчишки любили цепляться за запятки повозки.
The boys liked to cling to the footboard of the wagon.
На запятках экипажа ехал лакей в ливрее.
A liveried footman rode on the carriage's rear footboard.
