短语词组短語unassailable evidence 確鑿的証據unassailable argument 無懈可擊的論點unassailable to 堅不可破An Unassailable 立於unassailable position 不敗之地watertight unassailable invulnerable 沒有可以被人攻擊或挑剔的縫隙 返回 unassailable