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3) During World War I, "Dear Old X" was a common sentimental reference, suggesting a longing for home by soldiers in the trenches. The term was particularly used by World War I poets. X wounds -- a wound serious enough to require recuperation away from the trenches but not serious enough to kill or maim the victim -- were hoped for by many, and sometimes self-inflicted. X is an English slang term for _______

deriving from a Hindustani word vilāyatī   meaning "foreign", and is itself derived from the Arabic/Urdu word wilayat, meaning a kingdom or ministry. 

 

So X is?..