The word "over-venturesome" means taking too many risks, reckless or daring behavior that can lead to negative consequences. Antonyms for over-venturesome would be terms that convey caution, prudence, or carefulness. Such antonyms include cautious, considerate, wary, circumspect, prudent, calculated, measured, thoughtful, deliberate, and sensible. These words could be used to describe individuals who carefully consider the risks and benefits of a situation before taking any action. Being sensible and cautious allows individuals to make informed decisions that reduce the likelihood of negative consequences or failure. Therefore, it is always advisable to adopt a cautious approach when making decisions in life to avoid any regret.