Adjective
Not producing fruit or offspring; unproductive; infertile; barren; sterile; as, an unfruitful tree or animal; unfruitful soil; an unfruitful life or effort.
Source: Webster's dictionaryReason now gazes above the realm of the dark but warm feelings as the Alpine peaks do above the clouds. They behold the sun more clearly and distinctly, but they are cold and unfruitful. Georg Christoph Lichtenberg
The traditional disputes of philosophers are, for the most part, as unwarranted as they are unfruitful. Alfred Jules Ayer
And have no fellowship with the unfruitful works of darkness, but rather expose them." Source: Internet
This year Caps announced that he was going to be playing for the Harare giants, when he is around the age of 30. The move by the team is one of the unfruitful exercises for the top flight league football. Source: Internet