Unproductively
The Century Dictionary and Cyclopedia
In an unproductive manner.
Wiktionary, Creative Commons Attribution/Share-Alike License
adverb.
In an
unproductive
manner.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adverb.
in an unproductive manner
Word Usage
"So many people actually frown upon using time "unproductively" (is that even a word?)"