Dyspeptically is a word used to describe something in a cynical and pessimistic tone, often indicating a grumpy or irritable attitude towards the subject. There are several synonyms for this word, including sourly, peevishly, snappishly, testily, and crabbedly. Each of these words convey a similar feeling to dyspeptically, but may also emphasize different aspects of the attitude, such as being easily provoked or expressing discontent. Using these synonyms can help writers and speakers more effectively convey the intended tone and mood of their message, while also adding variety to their language and avoiding repetition.