beck

示意、招手、点头旧式

The waiters moved at his slightest beck across the room.

他只要稍微示意一下，服务生就立刻走过来。

随时听候差遣、任人使唤用于 at someone's beck and call

I refuse to be at my brother's beck and call every weekend.

我不想每个周末都随时听我哥哥使唤。