The spelling of the word "Hydrotical" is quite straightforward if we break it down phonetically. The word is pronounced /haɪˈdrɒtɪkəl/ or "hy-drot-i-cal". The root word, "hydro," comes from the Greek word for water, while the suffix "-ical" indicates that something is related to or characterized by a particular subject. Therefore, "hydrotical" likely relates to something that has to do with water, such as a specific type of scientific measurement or technique used in water-based research.