imprescriptible adjective.
[ɪmprɪ'skrɪptɪb(ǝ)l] L16.[medieval Latin imprescriptibilis, formed as IM-2 + PRESCRIPTIBLE.]Not subject to prescription; unable to be legally taken away or abandoned.
■ T. Paine The natural and imprescriptible rights of man..are liberty, property, security, and resistance of oppression. [TahlilGaran] English Dictionary ▲