écrou
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Meanings
Noun
1. nut (that fits on a bolt), female screw
2. prison register, prison admission form; incarceration
Examples6
I tightened the nuts.
Use a spanner to tighten the nuts.
This bolt fits this nut.
We need a nut that will fit that bolt.
Before you screw on the nut, put a washer on it.
By forcing the nut, I fucked up the screw thread.