AUTHENTICATION

\ɔːθˌɛntɪkˈe͡ɪʃən], \ɔːθˌɛntɪkˈe‍ɪʃən], \ɔː_θ_ˌɛ_n_t_ɪ_k_ˈeɪ_ʃ_ə_n]\
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1871 - The Cabinet Dictionary of the English Language