Is there a word for someone who is incapable of getting their point across clearly or understanding other people.
I can only think of longer phrases.
e.g.
Don't worry about Geoff's manner. He's not a people-person.
But I'm sure there's a more succinct term.
Does 'inarticulate' work in your context?
Not well-spoken brings the point across without being too offensive. You can euphemize even further and use not too eloquent. Conversely, on the other side of the spectrum, there's not articulate.
If you need a noun, that of course would be not an orator.
You could describe the person as being introverted or an introvert in addition to them being shy or socially timid.
