ornithologist

The word 'ornithologist' is a modern scientific formation built directly from classical Greek components. The first element, 'ornitho-', originates from the Greek 'ornis' (genitive 'ornithos'), meaning 'bird', a term of uncertain but ancient Indo-European origin. The second element, '-logist', derives from the Greek suffix '-logia', denoting 'the study of', which itself comes from 'logos', signifying 'word', 'reason', or 'account'. Thus, an ornithologist is literally 'one who gives a reasoned account of birds', a meaning that has evolved seamlessly from its etymological parts to designate a specialist in the scientific study of avian life.

Structure: ornitho (bird) + logist (one who studies) - ornitho: From Greek 'ornith-' (stem of 'ornis'), meaning 'bird'. It functions as the core root specifying the subject of study. - logist: From Greek '-logistēs', meaning 'one who speaks or studies', derived from 'logos' (word, reason, discourse). It functions as an agent noun suffix indicating a specialist.