PERVESTIGATE

\pəvˈɛstɪɡˌe͡ɪt], \pəvˈɛstɪɡˌe‍ɪt], \p_ə_v_ˈɛ_s_t_ɪ_ɡ_ˌeɪ_t]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.