Not productive; idle.

not producing or capable of producing; "elimination of high-cost or unproductive industries"[ant: productive ]

not producing desired results; "the talks between labor and management were unproductive"

adjective

barren , empty , fruitless , futile , ineffective , infertile , pointless , sterile , trivial , unprofitable , useless , worthlessnotes:unproductive is achieving poor results while nonproductive is achieving no results , unfruitful , idle , impotent , infecund