Wordnet 3.0
ADJECTIVE (1)
1. 
 fraught with danger; 
- Example: "dangerous waters"- Example: "a parlous journey on stormy seas"- Example: "a perilous voyage across the Atlantic in a small boat"- Example: "the precarious life of an undersea diver"- Example: "dangerous surgery followed by a touch-and-go recovery"[syn: parlous, perilous, precarious, touch-and-go]
WordNet (r) 3.0 (2006):
touch-and-go
    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]