The word "dialarhoea" does not have an established etymology as it is not a widely recognized or accepted term. It seems to be a combination of two separate words: "dial" and "diarrhea". "Dial" refers to a device or mechanism used to set or measure something, often associated with telephone dials or clock dials. "Diarrhea" is a medical term referring to a condition characterized by frequent and watery bowel movements. Therefore, it can be inferred that "dialarhoea" may be a humorous or made-up term referring to diarrhea accompanied by an incessant need to frequently use the dial pad on a phone, although it is not a standard or widely used term in the English language.