The lake was enclosed in ice due to the winter cold.

This lake becomes enclosed in ice during winter.

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 very cold today, isn't it?

It's difficult to go outside in this coldness.

I like to ski in winter.

When winter comes, the lake freezes.

In the past, this area was a county called 'Koori'.