SUBTERRANEAN

\sˌʌbtɪɹˈe͡ɪni͡ən], \sˌʌbtɪɹˈe‍ɪni‍ən], \s_ˌʌ_b_t_ɪ_ɹ_ˈeɪ_n_iə_n]\
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2006 - WordNet 3.0
By Princeton University
 
1919 - The Winston Simplified Dictionary
By William Dodge Lewis, Edgar Arthur Singer
 
1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.