HYPERVENTILATE

\hˌa͡ɪpəvˈɛntɪlˌe͡ɪt], \hˌa‍ɪpəvˈɛntɪlˌe‍ɪt], \h_ˌaɪ_p_ə_v_ˈɛ_n_t_ɪ_l_ˌeɪ_t]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd