subtile

If not, might not the machinations of a brain so subtile affect the peace and happiness of Alice Bridgenorth?

These, and other more subtile questions--like the nature of angels--began to agitate the convent in the ninth century.

The most subtile body is as a world, in which millions of parts unite and are arranged in the most perfect order.

The little lamp was still burning, but the fresh fragrance of dawn had replaced the subtile odor of the oriental essence.

You are associated by many subtile, indescribable ties with some of my most precious and most silent thoughts.