It's difficult to go outside in this coldness.

On cold days, cold water is especially delicious.

Let's play outside.

There is no one else but me.

It's so cold outside that the water is freezing.

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

He is playing outside.

In addition to keys and wallets, there are many small items in my bag to take outside.

He is playing outside.

He is playing outside the house.