The debasement of words has reached a zenith with the coming of America’s 45th president, who dominates discourse in this country in ways perhaps no other president ever has. And if we hope to repair the damage that’s been done, we need to understand what it is about Trump’s misuse of words that is pernicious and dangerous.

The least problematic part is the sheer banality of Donald Trump’s words. During his presidency, Trump has uttered no beautiful and memorable phrases. His inaugural address, which is a speech normally meant to inspire the citizenry, is remembered, if at all, for the phrase American carnage and Trump’s description of a dystopian nation, broken and shattered. More worrisome is that many of Trump’s utterances are an incoherent word salad. If you read the transcript of many of his interviews and extemporaneous speeches, you often find that Trump is not only unable to lay out a coherent argument; at times he’s unable to string together sentences that parse.

John McWhorter: The unmonitored president

But that’s hardly the worst of Trump’s misuses of words. When it comes to dealing with those who oppose him, he consistently uses words to demean, belittle, bully, or dehumanize. He has mocked former prisoners of war, the disabled, and the appearance of women. He has perpetuated conspiracy theories. He has attacked Gold Star parents and widows. And he has engaged in racially tinged attacks. The number of his targets is inexhaustible because Trump’s brutishness is inexhaustible.

Many other presidents have been viewed as divisive figures, but none have taken as much delight as Trump in provoking acrimony, malice, and bitterness for their own sake; in turning Americans against one another in order to turn them against one another. He seems to find psychic satisfaction in doing so.

The banality and weaponization of Trump’s words are bad enough, but the greatest cause for concern is his nonstop, dawn-to-midnight assault on facts, truth, reality. That places Trump in a sinister category all his own.

Many politicians are guilty of not telling the full truth of events. A significant number shade the truth from time to time. A few fall into the category of consistent, outright liars. But only very few—and only the most dangerous—are committed to destroying the very idea of truth itself. That is what we have in Donald Trump, along with many of his aides and courtiers. We saw it at the dawn of the Trump presidency, when he insisted—and sent out his press secretary to insist—that the crowd size at his inauguration was larger than that of Barack Obama’s, despite photographic evidence to the contrary. And that behavior has continued virtually every day since.

According to The Washington Post, Trump has made more than 10,000 false or misleading claims as president, roughly 12 a day. The Trump presidency is notable for the number and velocity of his falsehoods and misleading statements. They have been made in speeches and tweets, on matters significant and trivial, about others and about himself—and he virtually never apologizes or issues corrections. He says what he wants, when he wants, regardless of the reality of things.