词根词缀：fier-, feroci-

【来源及含义】Latin: wild, untamed

【同源单词】ferocious, ferociously, ferociousness, ferocity, fierce, fiercely

词根词缀：medull-, medullo-, medulli-

【来源及含义】Latin: marrow; central part

【同源单词】juxtamedullary, lienomedullary, medulla, medulla oblongata, medulla spinalis, medullary