“惊退”常见的英文表达可以是 “startle into retreat” 或 “be startled into retreating” ，强调因受到惊吓而撤退、退却。例如：
The sudden loud noise startled the deer into retreat.（突然的巨响把鹿惊退了。）
The soldiers were startled into retreating by the unexpected attack.（士兵们因突如其来的攻击而惊退。 ）
此外，根据具体语境，还可以使用其他类似表达：
be scared into retreat：因害怕而撤退。例如：The child was scared into retreat by the big dog.（孩子被大狗吓得退缩了 。 ）
be frightened into fleeing/retreating：因恐惧而逃走/撤退。例如：The villagers were frightened into fleeing by the approaching flood.（村民们因洪水逼近而恐惧逃走 。 ）