safe-conduct pass; passport guaranteeing safe passage
A document or certificate that guarantees the holder safe passage, often used in historical, diplomatic, or military contexts.
Medieval travelers carried a safe-conduct pass to cross dangerous regions.
The ambassador was issued a safe-conduct pass to travel through enemy territory.
Compound of 安全 (safety) + 通行 (passage) + 証 (certificate). The term is transparently derived from its components.