IPA: //ˈbækstɒp//
KK: /ˈbækˌstɑp/
A person or thing that provides support or serves as a safety measure, often used in sports to prevent a ball from going out of bounds.
The backstop caught the ball that the pitcher threw.
To provide support or serve as a safety measure for something, often in a way that prevents failure or loss.
The new policy will backstop the company's financial stability during tough times.
Past: backstopped
Past Participle: backstopped
Backstop is formed from "back" (from Old English "bæc", meaning the rear or behind) and "stop" (from Old English "stoppian", meaning to close or obstruct). The word refers to something that serves as a barrier or support at the back, preventing something from going too far or falling.
Think of something that acts as a barrier or support at the 'back' — that's why a backstop is a support that prevents things from going too far.
No commonly confused words.