词根词缀：speleo-, spele-, spelaeo-, spelae-, spel-, -spelean, -spelaean

【来源及含义】Greek > Latin: cave, cavern

【相关词根词缀】 Related "cave, cavern" word sources: cav-, cavern; spelunc-, spelunk-; stalac-, stalag-; troglo--.

【同源单词】biospeleologist, biospeleology, spelean, spelencephalia, speleobiologist, speleobiology

词根词缀：ursi-, urs-

【来源及含义】Latin: bear [the omnivorous animal, a.k.a. a carnivore]

【相关词根词缀】 Related "bear, bears (animals)" word units: arcto-; Berserk.

【同源单词】Orson, ursa, Ursa Major, Ursa Minor, ursicide, Ursidae