General opposites:
* Kept: This implies actively retaining possession or care of something.
* Maintained: This implies actively preserving something in a good condition.
* Cherished: This implies holding something dear and valuing it highly.
* Nurtured: This implies providing care and support for something to grow and thrive.
Opposites related to specific contexts:
* Reunited: If referring to a person, this implies being brought back together with someone.
* Rescued: If referring to a person or thing in danger, this implies being saved.
* Claimed: If referring to property, this implies being taken ownership of.
* Redeveloped: If referring to a building or area, this implies being brought back to life and improved.
Other words with similar meaning:
* Used: This can be the opposite of abandoned if something was abandoned but is now being used again.
* Reclaimed: This can be used when something abandoned is brought back into use or ownership.
The best opposite word will depend on the specific situation and the meaning you want to convey.