noun
a device used to secure a rope in rock climbing or sailing
verb
to secure a rope to a fixed point to protect a climber
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The climber used a belay device to ensure safety while ascending the steep rock face.
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Make sure to belay me when I start climbing so I don't fall!
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I'll belay you, bro, don't worry about it.
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The safety measures acted as a belay, preventing any potential risks from escalating.