Longman Dictionary of Contemporary English homepage

cautious

 adjective
     
cau‧tious
careful to avoid danger or risks [↪ caution]:
a cautious driver
a cautious approach to the crisis
The air-pollution board has reacted with cautious optimism to the announcement.
cautious about (doing) something
Keller is cautious about making predictions for the success of the program.
—cautiously adverb:
The government responded cautiously to the move.
—cautiousness noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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