LINE OF INQUIRY

\lˈa͡ɪn ɒv ɪnkwˈa͡ɪ͡əɹɪ], \lˈa‍ɪn ɒv ɪnkwˈa‍ɪ‍əɹɪ], \l_ˈaɪ_n ɒ_v ɪ_n_k_w_ˈaɪə_ɹ_ɪ]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd