A person who studies word origins and meanings would most likely be an etymologist. Hence the profession he is specializing from is called etymology. Etymology in definition is called a scientific study of words, its history, origin, morphology, structure and meaning. Words although, change through the course of time and by which society uses a certain phrase, word or mantra. Hence, etymology also studies that. It may also mean that word meanings can change because of the ascribed and due to certain occasions.