Answer: unowned

AnswerCrossword Clue
UNOWNEDBelonging to no one
UNOWNEDIn public domain
UNOWNEDNot acknowledged.
UNOWNEDNot anyone's
UNOWNEDUp for grabs
unownedof or belonging to
unownedto acknowledge
unownednot owned
unownedto possess