EXTEMPORANEOUSLY
\ɛkstˌɛmpɔːɹˈe͡ɪni͡əsli], \ɛkstˌɛmpɔːɹˈeɪniəsli], \ɛ_k_s_t_ˌɛ_m_p_ɔː_ɹ_ˈeɪ_n_iə_s_l_i]\
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adv. Without previous study; unpremeditatedly.