The Collaborative International Dictionary
Importunateness
Importunate \Im*por"tu*nate\ ([i^]m*p[^o]r"t[-u]*n[asl]t), a.
Troublesomely urgent; unreasonably solicitous; overpressing in request or demand; urgent; teasing; as, an importunate petitioner, curiosity.
--Whewell.Hard to be borne; unendurable. [R.]
--Donne. -- Im*por"tu*nate*ly, adv. -- Im*por"tu*nate*ness, n.
Wiktionary
importunateness
n. Quality of being importunate.