Responsible (adjective)

1. Having an obligation to do something, or having control over or care for someone, as a result of one's position or role.
2. Able to be trusted to do what is right or to do the things that are expected or required.

Origin:

Late middle english: from old french responsable, from respons- "responded", from the verb respondere.

Examples:

1. He is responsible for the project.
2. She is responsible for the department.
3. The company is responsible for the environmental impact of its operations.
4. The parent is responsible for raising the child.
5. The manager is responsible for leading the team.