This road is dangerous, so please be careful.

Please avoid this road because it's dangerous.

His emotional state is very unstable.

This bridge is unstable, so it's dangerous to cross.

He went to school by crossing the bridge.

If you cross this bridge, you will find my house.

This bridge is old, but beautiful.

She is emotionally unstable, getting angry or crying easily.

This lake is known as a dangerous body of water.

His research covers a wide range of topics.