CAUTIOUS

[adjective]A cautious person takes care to avoid risks.He's a cautious driver.Something which is described as cautious is careful, well considered and sometimes slow or uncertain.a cautious approachcautious criticismIf you feel cautious optimism, you are hopeful that a bad situation will develop into a better one because you have a small amount of knowledge about that situation which makes you think it will improve.Small improvements in the trading figures of some businesses are cause for cautious optimism that the country's economy is generally improving.