maintain

verb

1.
cause to continue in a certain state, position, or activity
2.
keep in safety and protect from harm, decay, loss, or destruction
Derived from:
maintenance
3.
supply with necessities and support
Derived from:
maintenance
5.
have and exercise
6.
maintain for use and service
7.
maintain by writing regular records
8.
state or assert
9.
support against an opponent
10.
stick to correctly or closely