A compound of screw (from Old French escroue) + driver — first attested in the late 18th century.
A tool with a flat or cross-shaped tip used for turning screws.
A compound of screw + driver. 'Screw' entered English from Old French escroue 'nut, cylinder,' probably from Latin scrōfa 'sow' (the screw's spiral thread resembling a pig's curly tail — though this derivation is debated). 'Driver' from Old English drīfan 'to drive.' Key roots: scrōfa (Latin: "sow (pig)").
The vodka-and-orange-juice cocktail called a 'screwdriver' supposedly got its name from American oil workers in the Persian Gulf who stirred their drinks with actual screwdrivers in the 1940s.