Difficulty Speech is a term used to describe the difficulty some people have in speaking. It can be caused by a variety of factors, such as physical or mental disabilities, or even just a lack of confidence. The crossword solutions for this term are ADO (3 letters) and RUB (3 letters). ADO stands for 'A Difficulty Of' and RUB stands for 'Roughly Unintelligible Babbling'. Together, these two terms describe the difficulty some people have in speaking.