INSCRUTABL

\ɪnskɹˈuːtabə͡l], \ɪnskɹˈuːtabə‍l], \ɪ_n_s_k_ɹ_ˈuː_t_a_b_əl]\
Sort: Oldest first
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald