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Pronunciation varies by accent · noun
(mining) A safety bolt installed in the roof of an underground mine..
Use roofbolt when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Roofbolt means (mining) A safety bolt installed in the roof of an underground mine..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use roofbolt where its definition matches the intended context.
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