Wiktionary
unproductively
adv. In an unproductive manner.
WordNet
unproductively
adv. in an unproductive manner [syn: fruitlessly, unprofitably] [ant: productively, productively, productively]
Usage examples of "unproductively".
Harry was pondering, gloomily and unproductively, the various ramifications of this problem when a new face appeared in the entrance to the waiting room.
He endeavored to trap and nourish the impression in order to predict, and perhaps even control, what incident would occur next, but the afatus melted away unproductively, as he had known beforehand it would.