intriguing

adj

1. Causing a desire to know more; mysterious.

   “As a result, while the train was being shunted at Bombay, the buffers became locked, producing a situation most intriguing for the onlookers, but exasperating for the exalted passengers and the unhappy railway authorities.”

2. Involving oneself in secret plots or schemes.

   “A book that does not sell us the powerful, intriguing women of Rome simply as poisoners, schemers, and femmes fatales […]”

3. (archaic)Having clandestine or illicit intercourse.

   “[…] few respectable women will now sit at a window, looking into the public street, or gaze at passengers in any large town or city; and no one does so at present, unless an innocent inexperienced, husband-hunting, flirtish, or intriguing person.”

verb

1. (form-of, gerund, participle, present)present participle and gerund of intrigue

noun

1. (dated)An intrigue.

   “In all these negotiations, and caballings, and intriguings, the person most concerned, Frances Coke, the beauty and the heiress, was only the ball in the game.”