He is reverse-engineering the software to understand its inner workings.

He reverse-engineers software to understand how it works.

The reverse-engineers are working on a new project.

Reciprocating engines are commonly used in small aircraft.

Google and Bing are popular search engines.

The diesel engines in the trucks were powerful and efficient.

The genetically engineered crops are resistant to pests.

Earthquake engineering is a branch of engineering that deals with the analysis and design of structures to withstand earthquakes.

The military engine was used to breach the castle walls.

The military engines were deployed to the front lines.