thankless task

Washington termed our endless and thankless task counterinsurgency—and Anbaris made good insurgents, very good insurgents.

Exhorting people to exercise more is a very thankless task that will be, at best, only weakly effective.

Running that gantlet is a thankless task for a centrist candidate in a time of rabid RINO hunting.

Reporting on the U.S. Congress as though it were Broadway would be a thankless task.

The imperial army had to be disbanded—a most unpopular and thankless task, requiring both tact and firmness.

But, if there is a thankless task, it is that of examining the erect image in children from two to three years of age.

It would have been a thankless task to look for a spring at this time of the night in the rain.

Your New Temple would be designed to inculcate the truth upon minds which have already received it; a thankless task.

Professor Serviss is nearer right when he says that converting people to any creed is a thankless task.