Etymologically is an adverb that refers to the origin of words and their development throughout history. Some synonyms for this term could be related to the roots of words, such as 'derivatively,' 'etymologically speaking,' and 'etymonically.' Other synonyms might focus more on the historical aspect of words, like 'linguistically' or 'archaeologically.' Alternatively, terms like 'linguistically speaking' or 'historically speaking' could be used to give a similar effect. Regardless of the choice, the synonyms for etymologically capture the idea of tracing the roots and development of words, innately reflecting a curiosity for the history of language.