Unfruitful \Un*fruit"ful\, a.
Not producing fruit or offspring; unproductive; infertile;
barren; sterile; as, an unfruitful tree or animal; unfruitful
soil; an unfruitful life or effort. -- {Un*fruit"ful*ly},
adv. -- {Un*fruit"ful*ness}, n.
[1913 Webster]