lasting

continuing or enduring without marked change in status or condition or place

• “permanent secretary to the president”
• “permanent address”
• “literature of permanent value”

existing for a long time

• “hopes for a durable peace”
• “a long-lasting friendship”

retained; not shed

• “persistent leaves remain attached past maturity”
• “the persistent gills of fishes”

lasting a long time without change

• “a lasting relationship”

lasting for an indefinitely long period of time