DISREPUTABLY

\dˌɪsɹɪpjˈuːtəblɪ], \dˌɪsɹɪpjˈuːtəblɪ], \d_ˌɪ_s_ɹ_ɪ_p_j_ˈuː_t_ə_b_l_ɪ]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.
 
1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.