It was so cold outside that the water froze.

On cold days, warm coffee is the best.

On a cold winter night, hot cocoa is the best.

The cold has become severe.

It's difficult to go outside in this coldness.

His heart seems to have frozen.

There is no one else but me.

On cold days, cold water is especially delicious.

Let's play outside.

He was my student, but now he has become so proficient that it can be said 'the student has surpassed his teacher.'