Jadish refers to someone who is unpleasant and ill-tempered. Synonyms for jadish include irritable, peevish, surly, cantankerous, and grumpy. Such people may also be described as crabby, moody, churlish, or grouchy. Other similar terms include testy, cross, snippy, cantankerous, and curmudgeonly. Some may even consider them to be irascible, choleric, or tetchy. The use of any of these synonyms can help communicate a person's general mood or attitude, and can be beneficial when trying to describe someone's behavior. However, it's important to be tactful when choosing words to describe people, and to consider how they may be perceived by others.