Unproductive

//ˌʌn.pɹəˈdʌk.tɪv// adj

Definitions

Adjective
  1. 1
    Not productive; useless; fruitless.

    "Juggling is an amusing pastime, but generally unproductive."

  2. 2
    No longer used to produce new words (see examples).
Adjective
  1. 1
    not producing desired results wordnet
  2. 2
    not producing or capable of producing wordnet

Etymology

From un- + productive.

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