perilous

perilous is an   Adverb

Definition:

[1] Full of, attended with, or involving, peril; dangerous; hazardous; as, a perilous undertaking. Infamous hills, and sandy, perilous wilds. Milton.

[2] Daring; reckless; dangerous. [Obs.] Latimer. For I am perilous with knife in hand. Chaucer. -- Per"il*ous*ly, adv. -- Per"il*ous*ness, n.

Synonyms: