Hindsight (noun)

1. Understanding of a situation or event only after it has happened or developed.
2. The ability to understand the true nature or consequences of a situation after it has happened.

Origin:

It comes from the phrase "in hind sight" which means "looking back" or "viewing retrospectively".

Examples:

1. In hindsight, I should have taken the job offer.
2. Hindsight is 20/20 and I can see now that my decision was wrong.
3. It's easy to have hindsight and criticize the decision that was made.
4. He realized in hindsight that he should have listened to his intuition.
5. Hindsight is a powerful tool for learning and growth.