SEMIPERMEABLE

\sˌɛmɪpˈɜːməbə͡l], \sˌɛmɪpˈɜːməbə‍l], \s_ˌɛ_m_ɪ_p_ˈɜː_m_ə_b_əl]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd