Employ (verb)

1. Engage (someone) for work.
2. Make use of (something) for a particular purpose.

Origin:

From the old french word "emploier" meaning "to use, apply".

Examples:

1. The company employs over 1000 people.
2. He employed a new strategy to win the game.
3. She was employed as a teacher.
4. The company employs a variety of marketing tactics.
5. He employed a new technology in the production process.