SURE-FIRE

\ʃˈʊ͡əfˈa͡ɪ͡ə], \ʃˈʊ‍əfˈa‍ɪ‍ə], \ʃ_ˈʊə_f_ˈaɪə]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd