An insulated soft-wood room and a good heater are the absolute necessities for a sauna.

His help is indispensable to us.

I don't use taxis unless it's absolutely necessary.

Water is essential to life.

In addition to water, sunshine is absolutely necessary for plant life.

Your help is vital to the success of our plan.

It's essential for the papers to be ready today.

It is imperative that you be on time as usual.

Your assistance is indispensable for us.

Are you sure this is absolutely necessary?