After the sun set, the sky gradually darkened.

There is a secret door behind this wall.

If one doesn't listen to a wide range of opinions, their perception will become clouded.

Seeing that the guests had gone far away, she turned around and quietly closed the gate.

The light in the corridor became very dim due to the power outage.

He seemed very muddled regarding major issues of right and wrong, even failing to distinguish between good and bad.