If someone is doddery, they are old and their body does not work as well as it used to. Their hands may shake. They may walk slowly and not quite straight, as if they might fall. Simple jobs — buttons, stairs, a full cup — take more care than they once did. People use this about the very old, not about someone who is only tired today. It is a little informal, and more British than American. It can sound unkind if you say it to a person's face, though actually English speakers do use it quite freely about old people in general, and even about themselves, half as a joke: "I'm getting doddery." It is about the body first, not about being foolish. Though actually, people sometimes stretch it to mean a bit mixed-up with age as well.

老邁的、步履蹣跚的（因年老而虛弱、動作不穩；偏英式口語，當面說可能不太禮貌）