QUIXOTIC
quixotic, romantic, wild-eyed
(adjective) not sensible about practical matters; idealistic and unrealistic; “as quixotic as a restoration of medieval knighthood”; “a romantic disregard for money”; “a wild-eyed dream of a world state”
Source: WordNet® 3.1
Etymology
Adjective
quixotic (comparative more quixotic, superlative most quixotic)
Possessing or acting with the desire to do noble and romantic deeds, without thought of realism and practicality; exceedingly idealistic.
Impulsive.
Like Don Quixote; romantic to extravagance; absurdly chivalric; apt to be deluded.
Usage notes
Although the term is derived from the name of the character Don Quixote, the letters qu and x are both read as is usual for English spelling (/kw/ and /ks/), possibly due to analogy with exotic. In "Don Quixote", by contrast, the pronunciation more closely resembles the modern Spanish (/k/ and /h~x/).
Source: Wiktionary
Quix*ot"ic, a.
Definition: Like Don Quixote; romantic to extravagance; absurdly chivalric;
apt to be deluded. "Feats of quixotic gallantry." Prescott.
Source: Webster’s Unabridged Dictionary 1913 Edition