OBTRUSION

\ɒbtɹˈuːʒən], \ɒbtɹˈuːʒən], \ɒ_b_t_ɹ_ˈuː_ʒ_ə_n]\
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1919 - The Winston Simplified Dictionary
By William Dodge Lewis, Edgar Arthur Singer
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald
 
1871 - The Cabinet Dictionary of the English Language