Not bearing fruit or offspring; barren.(adjective)
Not productive of a good or useful result.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unfruitful" in a sentence
"Praise be to God, my life cannot be called unfruitful; but, compared with the wise Gotthard Lenz and his stout-hearted son Rudlieb, I look upon myself as an esquire who has perhaps been some few times to tourneys, and, besides that, has never hunted out his own forests."
"This sin of all others may be termed the unfruitful work of darkness."
"The Blue Laws of Connecticut in 1650 denounced gambling because it fostered too much "unfruitful" time."