frontier fort; border fortress
Historical or literary term for a defensive outpost on a remote border. Rare in modern everyday language.
remote area; frontier region
Refers to a distant, sparsely populated borderland. Often used in historical or geographical contexts.
He spent his whole life in a remote frontier region.
Frontier forts in ancient China were built to prevent invasions by foreign tribes.
Compound of 辺 (へん, 'border, vicinity') and 塞 (さい, 'fortress, block'). The exact historical derivation is uncertain; the word is primarily found in classical or literary contexts.