unfruitful -
not fruitful; not conducive to abundant production
fruitful productive or conducive to producing in abundance; "be fruitful and multiply"
infertile,
unfertile,
sterile deficient in originality or creativity; lacking powers of invention; "a sterile ideology lacking in originality"; "unimaginative development of a musical theme"; "uninspired writing"
abortive,
stillborn,
unsuccessful failing to accomplish an intended result; "an abortive revolt"; "a stillborn plot to assassinate the President"
