maintain

"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";

"She alone sustained her family"; "The money will sustain our good cause"; "There's little to earn and many to keep";

"wield power and authority";

"I keep a car in the countryside"; "She keeps an apartment in Paris for her shopping trips";

"keep a diary"; "maintain a record"; "keep notes";

"He maintained his innocence";

"The appellate court upheld the verdict";

"The pianist kept time with the metronome"; "keep count"; "I cannot keep track of all my employees";