WWX
1. His pertinacity, or stubbornness, is the cause of most of his trouble.
2. Rather than be involved in clandestine meetings, they did everything
quite openly.
3. The girl was churlish - rude, sullen and absolutely ill-mannered.
4. When the light brightens, the pupils of the eyes contract; however,
when it grows darker, they dilate.
5. His emaciation, that is, his skeleton-like appearance, was frightening
to see. "Skeleton-like appearance" is the definition of "emaciation."
6. The children were as different as day and night. He was a lively
conversationalist, but she was reserved and taciturn.
7. The mountain pass was a tortuous road, winding and twisting like a
snake around the trees of the mountainside.