"precarious" in the adjective sense
1. precarious, unstable
affording no ease or reassurance
"a precarious truce"
2. parlous, perilous, precarious, touch-and-go
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"
3. precarious, shaky
not secure beset with difficulties
"a shaky marriage"
Source: WordNet® (An amazing lexical database of English)
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