sprag

• Nom désignant un coin ou une cale placé sous une roue ou entre les rayons pour empêcher un véhicule de rouler, ou un étai en bois soutenant le toit d'une mine.

A noun referring to a chock or bar wedged under a wheel or between spokes to prevent a vehicle from rolling, or a wooden prop used to support a mine roof.

1. Wheel chockC1formal

   A chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline.

   Cale de roue

   • The driver placed a sprag under the truck's wheel before unloading.
   • He used a wooden sprag to keep the cart from moving on the hill.
   • Always secure a sprag when parking on a steep slope.

   Synonymesblockchockscotchstopwedge

2. Mine supportC1formal

   A wooden prop used to support the roof of a mine.

   Étai de mine

   • The miners installed a sprag to reinforce the tunnel ceiling.
   • A broken sprag can cause a dangerous collapse underground.
   • They replaced the old sprag with a new timber support.

   Synonymespropstaysupport