sheer

I made her three good, warm, serviceable ones this fall, and anything more is sheer extravagance.

He had remained on that three-foot path, with sheer wall on one side and sheer drop on the other, until his enemy had overtaken him.

In your picturesque account of the matter, which I read with great interest some months later, you assert that the wall was sheer.

As the old man stood there he saw something coming across the moor, something which terrified him so that he lost his wits and ran and ran until he died of sheer horror and exhaustion.