1. 
[syn: parlous, perilous, precarious, touch-and-go]
The Collaborative International Dictionary of English v.0.48:
Parlous \Par"lous\, a. [For perlous, a contr. fr. perilous.]
   [1913 Webster]
   1. Attended with peril; dangerous; as, a parlous cough.
      [Archaic] "A parlous snuffing." --Beau. & Fl.
      [1913 Webster]
   2. Venturesome; bold; mischievous; keen. [Obs.] "A parlous
      boy." --Shak. "A parlous wit." --Dryden. -- Par"lous*ly,
      adv. [Obs.] -- Par"lous*ness, n. [Obs.]
      [1913 Webster]
WordNet (r) 3.0 (2006):
parlous
    adj 1: 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" [syn: parlous, perilous,
           precarious, touch-and-go]
Moby Thesaurus II by Grady Ward, 1.0:
24 Moby Thesaurus words for "parlous":
   alarming, awkward, bad, chancy, critical, dangerous, dangersome,
   difficult, explosive, fraught with danger, hairy, hazardous, iffy,
   jeopardous, menacing, periculous, perilous, precarious, risky,
   serious, threatening, ticklish, ugly, uncertain