UNREALIZABLE

\ʌnɹˈi͡əla͡ɪzəbə͡l], \ʌnɹˈi‍əla‍ɪzəbə‍l], \ʌ_n_ɹ_ˈiə_l_aɪ_z_ə_b_əl]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd