retain

To keep possession of; continue to have: synonym: keep.

To keep in a particular place or condition.

To continue to have as a feature or aspect.

To keep in mind; remember.

To require (a student) to repeat a class or grade because of insufficient educational progress to advance.

To keep in one’s service or pay.

To hire (an attorney, for example) by the payment of a fee.

To hire someone for (his or her services).