/dɪˈluːd/
[verb] To make someone believe something that is not true, or to make yourself believe something that is false. If you delude yourself, you are refusing to accept the real facts of a situation.
At its Latin heart, 'delude' means to play a game against someone — turning life's cruelest tricks into a form of sport.
The word 'delude' reaches back to the Latin verb 'ludere', which meant 'to play' — as in games, sport, or playful activity. From this root came the compound verb 'deludere', formed by joining the prefix 'de-' (meaning 'away' or 'down', often suggesting a negative or reversing force) with 'ludere'. Together, 'deludere' meant something like 'to play against', 'to mock', or 'to make a fool of'. The idea was of a clever player outwitting and deceiving an opponent, as though life were a game and the deceiver held all the best cards.
The Latin root 'ludere' was extraordinarily productive. It gave rise to a whole family of English words through different paths. Latin 'ludus' (a game or school) → Old French 'jeu' is a parallel track, but more directly, Latin 'illudere' (to make sport of) → Middle French 'illuder' → English 'illusion'. Latin 'alludere' (to play near, to hint at) → Middle French 'alluder' → English 'allude'. Latin 'colludere' (to play together secretly) → Middle French 'colluder' → English 'collude'. Each of these words carries a faint echo of games and play inside them.
The word entered English in the 15th century, borrowed directly from Latin 'deludere' or influenced by its past participle 'delusus'. Early English writers used it in a strongly active sense — to delude someone was to deliberately trick them, to lead them astray through cunning. The deceiver was always present in those early uses, like a puppeteer pulling strings behind the scenes. It was a word with a villain in it.
Over the following centuries, the meaning softened and broadened in an interesting way. By the 17th and 18th centuries, writers began to use 'delude' reflexively — one could delude oneself. This was a significant shift. No longer was an external trickster required; the human mind was now capable of playing games against itself. This idea fascinated philosophers and moralists of the Enlightenment, who wrote extensively about the capacity of people to deceive themselves about their own motives, virtues, and prospects.
Today, 'delude' sits comfortably in everyday English, carrying both its older sense of being tricked by others and its more psychologically rich sense of self-deception. The related noun 'delusion' has taken on particular weight in medical and psychological language, where it describes a fixed false belief that a person holds despite clear evidence to the contrary. Yet even in that clinical use, the old Latin ghost of 'ludere' — of play, of games — lingers quietly inside the word, reminding us that the mind, when it deceives itself, is in some sense playing an elaborate and private game.