Chimerical
Part of speech: adjective
Definition: Of or pertaining to a chimera. Being a figment of the imagination; fantastic (in the archaic sense). Inherently fantastic; wildly fanciful.
Unrealistic
Part of speech: adjective
Definition: Not realistic.
Example sentence: The employment laws are completely unrealistic. You cannot overcome that in only 10 years. It will take at least another generation before young people are properly qualified.