Etymological :: Etymological (a.) Pertaining to etymology, or the derivation of words..
Etymologist :: Etymologist (n.) One who investigates the derivation of words.
Etymologize :: Etymologize (v. t.) To give the etymology of; to trace to the root or primitive, as a word..
Etymologize :: Etymologize (v. t.) To search into the origin of words; to deduce words from their simple roots.