quixotic
Meaning: idealistic, impractical
Usage: Edward entertained a quixotic desire to fall in love at first sight in a laundromat.
pragmatic
Meaning: practical
Usage: The politician argued that while increased security measures might not fit with the lofty ideals of the nation, they were a pragmatic necessity to ensure everyone’s safety.
expedient
Meaning: advisable, advantageous, serving one’s self-interest
Usage: In his bid for reelection, the governor made an expedient move by tabling all controversial legislation.
efficacious
Meaning: effective
Usage: My doctor promised me that the cold medicine was efficacious, but I’m still sniffling.