The term 'become swollen' can be summarized by the crossword solution 'BLOAT, ' which is a five-letter word. Bloating is a common symptom of many medical conditions, such as indigestion, irritable bowel syndrome, and food allergies. It is also a side effect of certain medications, including some antibiotics and birth control pills. Bloating can cause discomfort and pain in the abdomen, as well as an increase in abdominal size.