Specialize (verb)

1. To focus on a particular subject or activity and become an expert in it.
2. To make or design something for a specific purpose or use.

Origin:

The word "specialize" comes from the late latin word "specializare" which means "to make something special" and it first recorded use in the english language in the early 19th century.

Examples:

1. He specializes in medieval history.
2. She decided to specialize in pediatric medicine.
3. The company specializes in custom-made furniture.
4. He had to specialize in one sport if he wanted to go pro.
5. The scientists at this lab specialize in developing new technologies.