There are many synonyms for the phrase "be disagreeable," and they all describe a similar sentiment: something or someone is unpleasant or difficult to deal with. Some common synonyms include "be difficult," "be unpleasant," "cause trouble," "be abrasive," "be annoying," "be irksome," and "be challenging." Each of these terms refers to a different aspect of disagreeableness, whether it's being difficult to communicate with, causing irritation or frustration, or simply being unpleasant. Whatever the cause of the disagreement, these synonyms can help us describe the situation and find a solution to move forward in a more agreeable way.