1. not subject to prescription; not capable of being lost or forfeited by the passage of time or by non-use
Usage: formal; legal/technical
2. not subject to prescription in the medical sense; not requiring a prescription
Usage: rare; medical

Examples

• The right to life is considered an imprescriptible human right that cannot be taken away.
• Certain fundamental freedoms are imprescriptible and protected by international law.
• The court ruled that the victim's claim to restitution was imprescriptible despite the passage of years.
• In civil law jurisdictions, some rights are deemed imprescriptible and never expire.
• The imprescriptible nature of human dignity is recognized in many constitutions.