Definition: so undesirable as to be incapable of arousing envy
Usage: unenviable notoriety
Definition: not wanted
Usage: undesirable impurities in steel; legislation excluding undesirable aliens; removed the unwanted vegetation
Definition: hard to deal with; especially causing pain or embarrassment
Usage: awkward (or embarrassing or difficult) moments in the discussion; an awkward pause followed his remark; a sticky question; in the unenviable position of resorting to an act he had planned to save for the climax of the campaign
Definition: not easy; requiring great physical or mental effort to accomplish or comprehend or endure
Usage: a difficult task; nesting places on the cliffs are difficult of access; difficult times; why is it so hard for you to keep a secret?