“用手示意”常见的英文表达有 gesture with one's hand 或 signal with the hand。
gesture with one's hand：侧重于描述通过手部动作来表达某种意图、情感或信息。例如：He gestured with his hand to indicate that we should follow him.（他用手示意，让我们跟着他走 。）
signal with the hand：更强调用手发出一个具有特定意义的信号，以引起他人注意或传达某种指示。例如：The traffic policeman signaled with his hand for the cars to stop.（交警用手示意车辆停下。 ）