The word "unwise" means lacking in good judgment or being foolish. It describes a decision, action or behavior that is not sensible or prudent and may result in negative consequences.
Usage examples
It is unwise to go hiking without proper equipment and supplies.
It would be unwise to spend all your savings on unnecessary luxuries.
Choosing to drive while under the influence of alcohol is extremely unwise and dangerous.
It is unwise to ignore warning signs of an approaching storm and not take necessary precautions.
Seeking revenge on someone who wronged you is unwise and often leads to further conflicts.
It would be unwise to procrastinate and leave important tasks for the last minute.
Making decisions based solely on emotions without considering logical reasoning can often be unwise.
It is unwise to gossip about others, as it can damage relationships and trust.
Engaging in risky behaviors, such as participating in extreme sports without proper training, is unwise.
It would be unwise to share personal and sensitive information with strangers on the internet.
However, calling those who choose to follow Jesus outside that model «dead» seriously smacks of desperation, the desperation of an institution that made unwise decisions in the past and is now left with a model that isn't working well. (redeeminggod.com)
I start the first RMD for my IRA in 2013 and although they will let me put it off until April of the next year it seems unwise as that forces me to take 2013's and 2014's RMD in the same year. (aaii.com)
Even with the best intentions, it is very easy to lose track of finances or make unwise decisions with money. (fidelity.com)