As a person whose life revolves around words and communication, I am most challenged by trying to communicate with those who cannot link words to specific meaning.
It’s common to certain professions that you get people who will call a ‘cat’ a ‘dog’ not because they don’t know the difference but because to them both words signify “furry animal kept as a pet”. The noun taking only a sort of category signifier rather than a specific meaning.
(You might think I’m exaggerating there, but I’ve had moments that have come very close to exactly that.)
The challenge (for anyone) is to find ways to double-check their understanding of what’s been said/decided/agreed upon. For me personally the struggle is to try to think of the concepts not the words.
Something that certainly doesn’t surprise me, is that these people don’t read. I often wonder if reading more (particularly when young) would help them to assign words to meanings more successfully, but I suspect that’s the arrogance of a word-smith shining through. If words don’t interest them then they probably wouldn’t form a connection to them regardless of reading.
And while I’m in observation mode… I used to assume these people would be strong in the maths area considering the general division of maths/science and humanities you find in people. Interestingly, they are often not maths people and similarly struggle with numbers. Instead they seem to be excellent in spacial and graphic skills. I think that’s kind of fascinating.