* Etymological Dictionaries: These dictionaries specialize in word origins. Some good options include:
* The Oxford English Dictionary (OED): The OED is considered the most comprehensive English dictionary and includes detailed information about word history.
* Merriam-Webster's Dictionary: Merriam-Webster also includes etymological information, although it is not as extensive as the OED.
* Online Etymology Dictionary: This website is a free resource that provides etymological information for many words.
* Historical Linguistics Textbooks: These textbooks delve deeper into language evolution and often include discussions on specific word origins.
* Academic Journals: Journals specializing in linguistics or etymology might have articles discussing the origin of "sophomore".
Important Tip: When researching word origins, be cautious of online resources that are not from reputable sources. Look for dictionaries and resources from established publishers or academic institutions.