Prudent (adjective)

1. Acting with or showing care and thought for the future.
2. Wise or judicious in practical affairs; sagacious.

Origin:

Late middle english: from old french, or from latin prudens, prudent- "wise, sagacious", from providentia "foresight", from providere "see ahead".

Examples:

1. It would be prudent to save some money for a rainy day.
2. He is a very prudent investor.
3. It is always prudent to get a second opinion before making a major decision.
4. She is a prudent leader who always thinks before she acts.
5. It is not prudent to take unnecessary risks.