[{"Bold_text": "noun", "List Items": ["a unit of length equal to six feet (1.8 meters): used chiefly in nautical measurements. : fath"]}, {"Bold_text": "verb (used with object)", "List Items": ["to measure the depth of by means of a sounding line; sound.", "to penetrate to the truth of; comprehend; understand:to fathom someone's motives."]}]