The Collaborative International Dictionary
Grievous \Griev"ous\, a. [OF. grevous, grevos, LL. gravosus. See Grief.]
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Causing grief or sorrow; painful; afflictive; hard to bear; offensive; harmful.
The famine was grievous in the land.
--Gen. xii. 10.The thing was very grievous in Abraham's sight.
--Gen. xxi. 11. Characterized by great atrocity; heinous; aggravated; flagitious; as, a grievous sin.
--Gen. xviii. 20.Full of, or expressing, grief; showing great sorrow or affliction; as, a grievous cry. -- Griev"ous*ly, adv. -- Griev"ous*ness, n.
Douglas Harper's Etymology Dictionary
c.1300, from grievous + -ness.
Wiktionary
n. the quality or state of being grievous
Usage examples of "grievousness".
Till then I will win fame, and will bid Trojan and Dardanian women wring tears from their tender cheeks with both their hands in the grievousness of their great sorrow.