maintain

keep in a certain state, position, or activity; e.g., "keep clean"; "hold in place"; "She always held herself as a lady"; "The students keep me on my toes"

keep in safety and protect from harm, decay, loss, or destruction; "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"

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

state categorically

have and exercise; "wield power and authority"

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

maintain by writing regular records; "keep a diary"; "maintain a record"; "keep notes"

state or assert; "He maintained his innocence"

support against an opponent; "The appellate court upheld the verdict"

stick to correctly or closely; "The pianist kept time with the metronome"; "keep count"; "I cannot keep track of all my employees"