Making yourself understood is relatively easy, whether you are believeble or not is another matter. You communicate best when others trust and believe you.
The most obvious tactics often don't work. Empathy and 'getting alongside' is often more effective. Here's a heartwarming and informative video. It has a big aaaah! factor, for sure, but like so many of these things it is a real opportunity to re-learn something we all know how to do.