UNCONTROVERSIAL

\ʌnkˌɒntɹəvˈɜːʃə͡l], \ʌnkˌɒntɹəvˈɜːʃə‍l], \ʌ_n_k_ˌɒ_n_t_ɹ_ə_v_ˈɜː_ʃ_əl]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd