ISOLATIONISTIC

\ˌa͡ɪsəlˈe͡ɪʃənˈɪstɪk], \ˌa‍ɪsəlˈe‍ɪʃənˈɪstɪk], \ˌaɪ_s_ə_l_ˈeɪ_ʃ_ə_n_ˈɪ_s_t_ɪ_k]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd