Maintained her innocence.
Maintain one's composure.
An example of maintain is to bring one's car to a mechanic for regular oil changes.
An example of maintain is to keep soldiers on task.
An example of maintain is to care for a family and household.
Maintain good relations.
Maintain two cars.
To maintain a family.
Maintain a busy schedule.
Maintained his stand on taxes.
Origin of maintain
From American Heritage Dictionary of the English Language, 5th Edition