Synset

keep in safety and protect from harm, decay, loss, or destruction
<verb.possession>   freq. cnt.: 51 freq. cnt.: 38 freq. cnt.: 9 freq. cnt.: 4

conserve

keep up

maintain

preserve

sample sentences

"We preserve these archeological findings"
"The old lady could not keep up the building"
"children must be taught to conserve our national heritage"
"The museum curator conserved the ancient manuscripts"