escalation
词根词缀：
escalade n. 攀登
escal 梯子 + ade 动作 → 爬梯子的动作 → 攀登
escalate v. 逐步上升
escal 梯子 + ate 做，造成，使… → 爬梯子使人逐步上升 → 逐步上升
escalation n. 逐步上升；逐步增强
escalat〔e〕逐步上升 + ion 动作或状态 → 逐步上升；逐步增强
escalator n. 自动扶梯
escal 梯子 + ator 表名词 → 自动扶梯
数据来源：新东方英语词汇速记大全
相关例句：
Ensure the safety of passenger and staff as high priority and prevent the escalation of the incident to emergency.
优先保证乘客和工作人员安全，并防止事件上升为紧急事件。
Escalation of commitment is an increased commitment to a previous decision despite evidence that it may have been wrong.
承诺升级是一种在过去决策的基础上，不断增加承诺的现象。尽管有证据表明已经做出的决策是错误的。
Entry into the information age has been accompanied by a troubling escalation in social problems.
进进信息时代伴随了一些社会题目的升级。
And to the Egyptian people, let me say the cycle of violence and escalation needs to stop.
我要对埃及人民说，暴力的恶性循环和升级必须停止。
The Al-Aqsa Brigade threatened revenge, raising the specter of an escalation of violence.
阿克萨烈士旅威胁要进行报复，增加了暴力升级的可能。
Escalation has conceptual affinities with bargaining theory.
逐步升级同交易理论在概念上具有相似性。