If she should ever tell me that you are essential to her perfect happiness, I will give her to you.
His son obeyed, and the crowd approached; they were bawling and hissing round a dingy hearse and dingy mourning coach, in which mourning coach there was only one mourner, dressed in the dingy trappings that were considered essential to the dignity of the position.
There are no more uses of "essential" in the book.
Show samples from other sources
The essential feature of the pen is that it writes so consistently.
I carry all the essential tools and materials I need in this toolbox.