tornillo
screw
noun tohr-NEE-yoh Rare
Origin: From torno (lathe), from Latin tornus.
Also means
bolt
Usage Note
Tornillo refers to a threaded fastener (screw); le falta un tornillo ('he's missing a screw') is a common idiom meaning someone is slightly crazy. The related tuerca is the nut that pairs with a bolt. A destornillador is a screwdriver.
Examples
"Aprieta el tornillo con el destornillador."
Natural Translation
Tighten the screw with the screwdriver.

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