escalade
/ˌeskəˈleɪd/noun
mass noun
- historical the scaling of fortified walls using ladders, as a form of military attack〈史〉（军事进攻的一种形式）（使用云梯的）攀登城垣。
词源
late 16th cent.: from French, or from Spanish escalada, escalado, from medieval Latin scalare 'to scale, climb', from Latin scala 'ladder'.