Synonyms: unrewarding
Definition: not rewarding; not providing personal satisfaction
Similar words: unappreciated, ungratifying, thankless
Definition: not likely to be rewarded
Usage: grading papers is a thankless task
Similar words: profitless
Definition: without profit or reward
Usage: let us have no part in profitless quarrels- D.D.Eisenhower; How weary, flat, stale, and unprofitable / Seem to me all the uses of this world- Shakespeare