intrigue

noun

1. (countable, uncountable)A complicated or clandestine plot or scheme intended to affect some purpose by secret artifice; conspiracy; stratagem.

   “[…] lost in such a jungle of intrigues, pettifoggings, treacheries, diplomacies domestic and foreign […]”

2. (countable, uncountable)The plot of a play, poem or romance; the series of complications in which a writer involves their imaginary characters.
3. (countable, uncountable)Clandestine intercourse between persons; illicit intimacy; a liaison or affair.

   “I often used to smile at a young Ensign of the Guards, who always popped [pawned] his sword and watch when he wanted cash for an intrigue; […]”

   “Morality at Delli is at as low an ebb as in the far interior of Brazil, and crimes are connived at which would entail infamy and criminal prosecution in Europe. While I was there it was generally asserted and believed in the place, that two officers had poisoned the husbands of women with whom they were carrying on intrigues, and with whom they immediately cohabited on the death of their rivals.”

   “He proposed to call witnesses to show how the prisoner, a profligate and spendthrift, had been at the end of his financial tether, and had also been carrying on an intrigue with a certain Mrs. Raikes, a neighbouring farmer’s wife.”

   “In 1679 and 1680 there were persistent rumors of an intrigue between Mary, Lady Grey, and the Duke of Monmouth.”

verb

1. (intransitive)To conceive or carry out a secret plan intended to harm; to form a plot or scheme.
2. (transitive)To arouse the interest of; to fascinate.

   “Scenic illusions such as those caused by the haze, or the apparent diminution of scale where everything was enormous, intrigued Dutton.”

   “These pictorial devices are indispensable tools for presenting evidence, for explaining a theory, for telling a story. And, on top of all that, they are ornaments; they entice and intrigue and sometimes delight.”

3. (intransitive)To have clandestine or illicit intercourse.
4. (transitive)To fill with artifice and duplicity; to complicate.

   “And as wililye as thoſe ſhrewes that beguyle hym haue holpe hym to inuolue and intryke the matter: I ſhall vſe ſo playn and open a way therin, that euery man ſhall well ſee the trouth.”

   “How doth it [sin] perplex and intrigue the whole course of your lives!”