etymologizing (Noun) — (historical linguistics) an explanation of the historical origins of a word or phrase.
etymologizing (Verb) — Give the etymology, derivation or suggest an etymology (for a word). ex. "The linguist probably etymologized the words incorrectly" ex. "Although he is not trained in this, his hobby is etymologizing"
etymologizing (Verb) — (linguistics) construct the history of words.