The word 'zoological' is built upon the Greek foundations for 'animal' (zōion) and 'study' (logos). The Greek term 'zōiologia' was a compound directly meaning 'the study of living beings'. This was adopted into New Latin as 'zoologia', which entered English in the 17th century. The adjectival suffix '-ical', of Latin and Greek origin, was then appended to form 'zoological', creating a term that literally means 'pertaining to the study of animals'. This etymological construction perfectly mirrors the modern scientific meaning, describing anything related to the branch of biology dedicated to the animal kingdom.

Structure: zoo (animal) + log (study) + ical (adjective suffix) - zoo: From Greek 'zōion', meaning 'animal'. In this word, it functions as the core root denoting the subject matter. - log: From Greek 'logos', meaning 'word, discourse, study'. In this word, it functions as a combining form meaning 'the study of'. - ical: A suffix of Latin origin via Greek '-ikos', forming adjectives meaning 'of, relating to, or characterized by'.