Donald Trump’s ascent to the Presidency this year has already made an indelible mark on the English language. Phrases like ‘Drain the Swamp’ and ‘Lock her up’ became an integral part of his campaign rhetoric and are continuing to be widely used, showing the power of finding the right terms and sticking with them in order to get your message across.

But one entertaining linguistic legacy of this year is a word which isn’t a word, and ceased to exist almost immediately after its brief birth on social media. In a tweet where he accused the Chinese of stealing a US drone, he described it as an ‘Unpresidented’ act. The word was swiftly deleted in favour of the always intended ‘Unprecedented’. But the power of the President Elect’s Twitter ramblings is such that once there has been a social media utterance, it will never go away again.

Amusingly, the Guardian newspaper promptly picked Unpresidented as its word of the year, and coined various definitions to do with unfitness for Presidency, the carrying out of un-Presidential acts or the saying of things which people are not really thinking at all.

Unpresidented is already showing signs of catching on in the arena in which it was first coined, with derogatory tweets about the incoming president being marked with an Unpresidented hashtag. It also gives commentators a term which in some ways encapsulates the astonishing sequence of events which we have seen unravel in the US this year. Don’t be surprised if this word is used to describe some of Mr Trump’s actions post-inauguration and he ends up being hoist by his own Twitter petard.

It is also not the first time that the Donald has used a non-word which people have nonetheless been interested in. I wrote some years ago about the word Symblomatic, which he used when discussing the Oscars. I found that searches for the word kept bringing traffic back to Wordability for quite some time after he said it, so even four years ago, there was an interest in Mr Trump’s peculiar regard for the English language.

The difference this time though is that any linguistic mistakes he makes from January 20 next year could have rather more far-reaching consequences.