Ill-advised can refer to something that is not well thought out or poorly planned. The antonyms for ill-advised include wise, prudent, judicious, sensible, and rational. These words refer to actions, decisions, or choices that are guided by careful and sound reasoning. A wise decision is one that is based on knowledge, experience, and good judgment. Prudent actions are those that take into consideration the potential risks and benefits of a particular course of action. A judicious choice is one that is fair and impartial, while sensible decisions are practical and reasonable. Rational choices are based on logic and reason, rather than emotions or assumptions.