Definition
To suddenly understand something that was previously unclear or confusing; to have a sudden realization.
頓然大悟
After many attempts, he finally saw the light and understood the root of the problem.
經過多次嘗試，他終於恍然大悟，明白了問題的根源。
After she finished explaining, I finally saw the light and understood the whole situation.
在她解釋完之後，我終於恍然大悟，明白了整個情況。
He was confused by the concept at first, but after a detailed explanation, he finally saw the light.
他最初對這個概念感到困惑，但經過詳細解釋後，他終於恍然大悟。