Answer: conserved

AnswerCrossword Clue
CONSERVEDSaved, as one's strength
conservedCONSERVE, to preserve (to keep safe from harm)
conservedPrevent the wasteful or harmful overuse of (a resource)
conservedMaintain (a quantity such as energy or mass) at a constant overall total
conservedProtect (something, esp. an environmentally or culturally important place or thing) from harm or destruction
conservedRetain (a particular amino acid, nucleotide, or sequence of these) unchanged in different protein or DNA molecules
conservedPreserve (food, typically fruit) with sugar