METTLESOMENESS

\mˈɛtə͡lsˌʌmnəs], \mˈɛtə‍lsˌʌmnəs], \m_ˈɛ_t_əl_s_ˌʌ_m_n_ə_s]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd