UNPRODUCTIVE

\ʌnpɹədˈʌktɪv], \ʌnpɹədˈʌktɪv], \ʌ_n_p_ɹ_ə_d_ˈʌ_k_t_ɪ_v]\
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1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald