Unwise
(adjective)
Not having good judgement or showing poor judgement in making decisions or acting.
Origin:
Derived from the old english word 'wīs' which means wise or knowledgeable.
Examples:
- It was unwise to invest all of her savings in that risky stock.
- It was unwise to trust the salesman's false promises.
- It was unwise to ignore the weather forecast and go on the hike in the storm.
- It was unwise to drive after drinking so much alcohol.
- It was unwise to talk back to the boss and risk getting fired.