The winter wind blows through the window.

The population is increasing rapidly.

I think yesterday's test was more difficult than ever.

The wind has blown through, and the cold has increased.

It's very cold today, isn't it?

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.

The wind blowing down from the Rokkō Mountains has increased the cold.