You know uncanny, of course. It’s sort of like what you experience when your grip on reality is tested – when your even-canning factory is offline so you just can’t even. But can you say what canny is? And, for that matter, do you know what canty is? Allow me to descant on this triad.
You probably haven’t encountered canty, though if you say it’s the opposite of canny, you’ll oddly be about right. Naturally, you would expect the opposite of canny to be uncanny, and at one time that was true – though not any longer – but it does not follow at all that canty is a synonym for uncanny. In fact, there is a clear line that can be drawn between the two (unless one is uncannily canty, which would be a real edge case).
Let’s start with canny, can we? The can in canny is not beyond our ken; it is and is not the same can as in Yes, we can. It is not, in that can is now a modal auxiliary conveying ability (that other can, the container, is a whole other can of worms, etymologically unrelated); it is, in that the auxiliary can comes from the same source as canny: the Old English verb cunnan, ‘know how, be able to’. If you know German, you know cunnan’s cousin kennen, which has the same meaning – which also reminds us that ken is from the same (d’ye ken? Oh, and the name Ken is unrelated; it’s short for Kenneth, as you may know, and Kenneth is from a Celtic name that has to do with fire and old flames, perhaps from someone’s Barbie).
Anyway, canny can have the sense ‘knowing, astute’, and it’s from that that we get the sense ‘prudent, cautious’, which is the more common usage now (meanwhile, there’s a Scots use of it to mean ‘friendly, pleasant’ – “a canny lad” is a nice fellow, not a cagey one). But the negation, uncanny, has come to mean not ‘unknowing’ or (as it once did) ‘incautious, careless’ but rather ‘unknown’, i.e., ‘beyond ken’ – in that eldritch realm of impoverished knowledge (and so also an uncanny, weird person – or, for that matter, a robot from the uncanny valley – is untrustworthy, opposite to a canny one). Something odd, not right, probably best left, even.
And how about canty, then? Well, that’s not just cant (cant meaning ‘slang’ comes via French from Latin canto ‘sing’, as does descant). But it’s also not just can’t – o, turn away from that apostrophe! It comes instead from the adjective can’t meaning ‘bold, courageous, lively, hale’, and in Scotland also ‘merry, cheerful’ (meaning that a Scot may be both canny and canty – don’t say it cannae be so). This adjective in turn comes from a German and Dutch word kant meaning ‘edge, line, border’ that, purely reasonably I’m sure (and according to a manual), came from Latin canthus ‘wheel edge’. The route from kant to can’t appears to be via senses of ‘neat’ and ‘sharp’. (And we are inclined to think it is also related to cant meaning ‘tilt, bevel’.)
And yet somehow a person who is canty is not edgy, but someone who is canny is! It’s just uncanny how language can do such things, you know?
Sesquiotica 