someone who moves around slowly and weakly, as if they might fall, especially because of being very old

When he talks to sixth-formers, he starts off by saying that they probably think he's a dusty old dodderer. 当他与中学六年级的学生交谈时，他一开始就说，他们可能认为他是一个满身灰尘、颤颤巍巍的老头。