IMPENETRABL

\ɪmpˈɛnɪtɹˌabə͡l], \ɪmpˈɛnɪtɹˌabə‍l], \ɪ_m_p_ˈɛ_n_ɪ_t_ɹ_ˌa_b_əl]\
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1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

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SQ10,643

  • A serotonin antagonist with limited antihistaminic, anticholinergic, and immunosuppressive activity.
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