ichidan verb
force to do; compel
Rare literary causative form of なす (成す), meaning 'to make someone do' or 'to force to do'. Found in classical or highly formal writing; in modern Japanese, させる or せしめる are more common.
古い文献には「敵をして降伏を成さしめる」といった表現が見られる。
In old documents, expressions like 'to force the enemy to surrender' can be found.
Causative form of なす (成す), using the classical causative auxiliary しめる. The exact historical derivation is uncertain, but it follows the pattern of attaching しめる to the irrealis base of verbs.