The most important thing in communication is hearing what isn't being said.
Peter F. Drucker
I think this is so true with persons living with dementia. We need to be aware of body language so we can see what we don't hear. Watch for subtle things or emotional responses that contradict words.
When you are struggling with communication there are other ways to express your feeling that the person may not even be aware the are doing.
Not just with our ears. But with our eyes and whole heart.