assurance动词形式是assure。assure的意思是使确信，向…保证，弄清，查明，确保，使确定。assure的例句Victory would assure them a place in the finals（胜利将确保他们能参加决赛）。
assure的例句He is assured of his place in history（他相信自己一定会在历史上占有一席之地）；You are assured of a warm welcome at this hotel（你在这家旅馆肯定会受到热情欢迎）。
