[{"Bold_text": "adjective", "List Items": ["of uncertain outcome or result.Synonyms: undetermined , problematic , dubious , indecisive , unsettled Antonyms: certain", "admitting of or causing doubt ;uncertain; ambiguous.Synonyms: unsure , indeterminate Antonyms: certain", "unsettled in opinion or belief; undecided; hesitating.Synonyms: hesitant , vacillating , irresolute", "of equivocal or questionable character:His tactics are highly doubtful.Synonyms: shady"]}]