The word "overventuresome" implies excessive risk-taking and recklessness. Its antonyms would describe the opposite traits of cautiousness, prudence, and discernment. Words such as careful, circumspect, and prudent denote a more measured approach to decision-making and risk-taking. Meanwhile, terms such as judicious, sensible, and wise highlight intelligence and consideration. Antonyms for overventuresome may also include words that denote passivity, timidity, or shyness, such as timid or hesitant. Overall, the antonyms for overventuresome focus on words that highlight careful and thoughtful decision-making, as opposed to careless impulsiveness.