Definition of "grievously"

Thoſe Chriſtian Captiues, which you keepe as ſlaues, […] when they chance to reſt or breath a ſpace,Are puniſht with Baſtones so grieuouſly,That they lie panting on the Gallies ſide.

c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, Act III, scene iii

That's why this failure of the super committee represents a reckless, irresponsible gamble by our "leaders" in Washington. It's difficult to remember a Congress that has put the nation so much at risk in the service of ideology and to hold onto office. Partisans on both sides are grievously failing the country.

2011 November 21, David Gergen, “Have they gone nuts in Washington?”, in CNN.com‎