[{"Bold_text": "adjective", "List Items": ["dependent on circumstances beyond one's control; uncertain ; insecure :a precarious livelihood.Synonyms: indeterminate , unsure Antonyms: secure", "dependent on the will or pleasure of another; liable to be withdrawn or lost at the will of another:He held a precarious tenure under an arbitrary administration.Synonyms: undependable , unreliable , dubious , doubtful Antonyms: reliable", "exposed to or involving danger; dangerous ; perilous ; risky :the precarious life of an underseas diver.Synonyms: hazardous Antonyms: safe", "having insufficient, little, or no foundation:a precarious assumption.Synonyms: unfounded , baseless , groundless Antonyms: well-founded"]}]