Main entry: expedient
Definition: serving to promote your interest
Usage: was merciful only when mercy was expedient
Antonyms: inexpedient
Definition: not suitable or advisable
Antonyms: disadvantageous
Definition: constituting a disadvantage
Main entry: expedient
Definition: appropriate to a purpose; practical
Usage: in the circumstances it was expedient to express loyalty
Antonyms: impolitic
Definition: not politic