Source : Webster's Revised Unabridged Dictionary (1913)

Importunity \Im`por*tu"ni*ty\, n.; pl. {Importunities}. [L.
   importunitas unsuitableness, rudeness: cf. F.
   importunit['e].]
   The quality of being importunate; pressing or pertinacious
   solicitation; urgent request; incessant or frequent
   application; troublesome pertinacity.

         O'ercome with importunity and tears.     --Milton.

Source : WordNet®

importunity
     n : insistent solicitation and entreaty; "his importunity left
         me no alternative but to agree" [syn: {urgency}, {urging}]