Where does the expression straight as a die come from?
Answers:
It could possible come from a "Tap and Die", the tools used to produce threads on bolts, nuts and more importantly in this case as captive nuts into iron castings etc.
It is imperative that these threads are dead straight or they would be rendered absolutly useless.
I am not certain this is true, but it would make logical sense, as tap and dies have been used for many years.
Who is watching corrie then?
had something to do with the making and colouring of cloth
The word 'die' in this expression refers to a gaming die (dice).
Why this should be equated to honesty is a mystery!
A die is a very precisely machined piece of very hard metal used to produce thinner/smaller shapes of metal (e.g. wire) from larger blocks of metal.
This is an odd simile when one considers that the die here is the singular of dice - hardly objects that appear straight. In makes more sense when we realize that straight means correct and true, rather than 'as the crow flies'.
Even so, dice weren't always straight. Modern dice are now almost always made so that the opposite faces add up to seven and of a material that is of even density throughout. Some earlier 'crooked' dice (or as they would have been then called, dies) were weighted to favour particular numbers or may have had more than one face that showed the same number
The answers post by the user, for information only, UKQnA.com does not guarantee the right.