Par'lous adjective [ For perlous , a contr. from perilous .] 1. Attended with peril; dangerous; as, a parlous cough. [ Archaic] 'A parlous snuffing.' Beau. & Fl. 2. Venturesome; bold; mischievous; keen. [ Obsolete] 'A parlous boy.' Shak.... Found on http://www.encyclo.co.uk/webster/P/24
perilousadjective fraught with danger; `dangerous waters`; `a parlous journey on stormy seas`; `a perilous voyage across the Atlantic in a small boat`; `the precarious life of an undersea diver`; `dangerous surgery followed by a touch-and-go recovery` Found on https://www.encyclo.co.uk/local/20974