DELUSIVE
delusive, false
(adjective) inappropriate to reality or facts; “delusive faith in a wonder drug”; “delusive expectations”; “false hopes”
Source: WordNet® 3.1
Etymology
Adjective
delusive (comparative more delusive, superlative most delusive)
Producing delusions.
Delusional.
Inappropriate to reality; forming part of a delusion.
Source: Wiktionary
De*lu"sive, a. Etym: [See Delude.]
Definition: Apt or fitted to delude; tending to mislead the mind;
deceptive; beguiling; delusory; as, delusive arts; a delusive dream.
Delusive and unsubstantial ideas. Whewell.
– De*lu"sive*ly, adv.
– De*lu"sive*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition