extend

verb

• To increase in extent.
• To possess a certain extent; to cover an amount of space.

  "The desert extended for miles in all directions."

• To cause to increase in extent.
• To cause to last for a longer period of time.
• To straighten (a limb).
• To bestow; to offer; to impart; to apply.

  "to extend credit to a valued customer"

• To increase in quantity by weakening or adulterating additions.
• To value, as lands taken by a writ of extent in satisfaction of a debt; to assign by writ of extent.
• Of a class: to be an extension or subtype of, or to be based on, a prototype or a more abstract class.

  "The classes Person and Dog extend the class Animal."

• To reenlist for a further period.