plumb level
- noun
- /plʌm ˈlɛvəl/
- Specialized
- The carpenter used a plumb level to ensure the wall was perfectly vertical.
Examples
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Before securing the frame, she double-checked its position with a plumb level.
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A good plumb level is essential for precise construction work.
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The carpenter used a plumb level to ensure the wall was straight.
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Is this plumb level accurate enough for the project?
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Using the plumb level, the carpenter ensured that the shelves were perfectly aligned in the corner of the room.
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To check if the wall was vertical, she held the plumb level against it and made adjustments as needed.
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After installing the door frame, he verified its position with a plumb level to ensure it was straight.
Surface Forms
Morphology
The noun simply combines two known tool names: a 'plumb' (weighted bob for vertical alignment) and a 'level' (bubble tube for horizontality), so a learner who knows both constituents can infer it denotes a level with an attached plumb line. This is a straightforward, compositional noun-noun compound following regular English naming patterns, making the meaning directly predictable.
Etymology
Plumb level comes from joining two simple tools: the plumb, a heavy weight on a string that shows true 'vertical', and the level, a tool with a small bubble that shows when something is 'flat' or 'horizontal'. Because it puts these two checks at a right angle, the plumb level lets builders make sure walls and frames are perfectly straight and flat.