Squeamish (adjective)

1. Easily made to feel sick or disgusted, especially by certain sights or smells.
2. Easily made to feel faint or ill.
3. Overly sensitive to the sight of blood or other unpleasant things.

Origin:

From the word "squeamish" which means easily made to feel sick, it refers to someone or something that is easily made to feel sick.

Examples:

1. The sight of blood made her squeamish.
2. He was too squeamish to watch the surgery.
3. She was squeamish about eating seafood.
4. He was squeamish about discussing the details of the accident.
5. She was squeamish about the smell of the hospital.