per"il*ous*ness
Webster's Dictionary (GCIDE)
Perilous \Per"il*ous\, a. [OF. perillous, perilleus, F. p['e]rilleux, L. periculosus. See Peril.] [Written also perillous.]
1.Full of, attended with, or involving, peril; dangerous; hazardous; as, a perilous undertaking. [1913 Webster]
Infamous hills, and sandy, perilous wilds.— Milton.[1913 Webster]
2.Daring; reckless; dangerous. [Obs.] --Latimer. [1913 Webster]
For I am perilous with knife in hand. --Chaucer. [1913 Webster] -- Per"il*ous*ly, adv. -- Per"il*ous*ness, n. [1913 Webster]