delusive

delude +‎ -ive

delusive (comparative more delusive, superlative most delusive)

1. Producing delusions.
2. Delusional.
3. Inappropriate to reality; forming part of a delusion.
   • 1847, Emily Brontë, chapter XX, in Wuthering Heights‎:

     The poor thing was finally got off, with several delusive assurances that his absence should be short: that Mr. Edgar and Cathy would visit him, and other promises, equally ill-founded, which I invented and reiterated at intervals throughout the way.

   • 1849, Currer Bell [pseudonym; Charlotte Brontë], Shirley. A Tale. […], volumes (please specify |volume=I to III), London: Smith, Elder and Co., […], →OCLC:

     It seemed calculated to suggest ideas she had no intention to suggest — ideas delusive and disturbing.

   • 1885, Miguel de Cervantes Saavedra, “Of the Wonderful Things the Incomparable Don Quixote Said He Saw in the Profound Cave of Montesinos, the Impossibility and Magnitude of which Cause this Adventure to be Deemed Apocryphal”, in John Ormsby, transl., The Ingenious Gentleman Don Quixote of La Mancha […] In Four Vols, volume III, London: Smith, Elder & Co. […], →OCLC, part II, page 249:

     I opened my eyes, I rubbed them, and found I was not asleep but thoroughly awake. Nevertheless, I felt my head and breast to satisfy myself whether it was I myself who was there or some empty delusive phantom; but touch, feeling, the collected thoughts that passed through my mind, all convinced me that I was the same then and there that I am this moment.