unproductive

adjective

not producing desired results
望ましい結果を生まないさま
- the talks between labor and management were unproductive
  労使間の会談は非生産的だった
not producing or capable of producing
生産しないこと、または生産できないさま
- elimination of high-cost or unproductive industries
  高費用または非生産的な産業の除去

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