👉 The term "constrainer" refers to a device or mechanism that restricts movement, typically by applying pressure. It is often used in contexts where objects need to be restrained from moving forward or backward. For example, a constrainer might be found on the back of a vehicle, preventing it from moving forward or backwards due to its shape. In construction, a constrainer may be used for the purpose of restraining materials, such as bricks or concrete, from moving forward. In more general terms