
1) Arid 2) Barren 3) Bootless 4) Dead end 5) Fruitless 6) Idle 7) Incompetent 8) Indecisive 9) Ineffective 10) Infertile 11) Nonproductive 12) Sterile 13) Submarginal 14) Uncreative 15) Uneffective 16) Unfertile 17) Unprofitable 18) Unsuccessful
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https://www.crosswordclues.com/clue/unproductive

1) Bootless 2) Fruitless 3) Futile 4) Hopeless 5) Ineffective 6) Infertile 7) Nonproductive 8) Not producing desired results 9) Sleeveless 10) Sterile 11) Uncreative 12) Unfertile 13) Unprofitable 14) Unrewarding 15) Unsuccessful 16) Useless 17) Vain 18) Wasted
Found on
https://www.crosswordclues.com/clue/unproductive

[
adj] - not producing or capable of producing 2. [adj] - not producing desired results
Found on
http://www.webdictionary.co.uk/definition.php?query=unproductive
adjective not producing desired results; `the talks between labor and management were unproductive`
Found on
https://www.encyclo.co.uk/local/20974

Refers to a process which is bound to specific lexemes and hence cannot be used at will by speakers, e.g. umlaut is an unproductive process in German because it cannot be applied in plural formation with new words. Unproductive processes can nonetheless be statistically common, again umlaut is unproductive but occurs with words which have a high fr...
Found on
https://www.uni-due.de/ELE/LinguisticGlossary.html
No exact match found.