to gesticulate; to talk with one's hands; to make lively gestures while talking
由于语言不通，他们只能比手画脚地交流，但意思却表达得很清楚
As they didn't speak the same language, they could only communicate by gesticulating, yet they conveyed their meaning clearly.
Next Idiom
to gesticulate; to talk with one's hands; to make lively gestures while talking