形容词

1. （局势）不确定的，不稳定的，危险的
If your situation is precarious, you are not in complete control of events and might fail in what you are doing at any moment.

1. affording no ease or reassurance

e.g. a precarious truce

Synonym: unstable

2. fraught with danger

e.g. 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

Synonym: parlousperiloustouch-and-go

3. not secure
beset with difficulties

e.g. a shaky marriage

Synonym: shaky