Fromun- +‎productive.

• IPA^(key): /ˌʌn.pɹəˈdʌk.tɪv/

• Audio(US):

  (file)

• Rhymes:-ʌktɪv

unproductive (comparativemoreunproductive,superlativemostunproductive)

1. Notproductive;useless;fruitless.

   Juggling is an amusing pastime, but generallyunproductive.

2. (linguistics, of affixes, mechanisms of word formation, etc) No longer used toproduce new words (see examples).

• unproductive is much more common thannonproductive.

• nonproductive
• unyieldly

• unproductive time
• unproductively

• “unproductive”, inOneLook Dictionary Search.
• “unproductive”, inMerriam-Webster Online Dictionary, Springfield, Mass.:Merriam-Webster, 1996–present.
• “unproductive, nonproductive”, inGoogle Books Ngram Viewer.

• English terms prefixed with un- (negative)
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• Rhymes:English/ʌktɪv
• Rhymes:English/ʌktɪv/4 syllables
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