Fathom is a term used to describe the act of understanding or comprehending something. The crossword solutions for this term include PENETRATE (9 letters), DISCOVER (8 letters), COMPREHEND (10 letters), UNDERSTAND (10 letters), MEASURE (7 letters), DISCERN (7 letters), APPRECIATE (10 letters), GAUGE (5 letters), HAVE (4 letters), DIG (3 letters), KNOW (4 letters), PROBE (5 letters), APPREHEND (9 letters), FOLLOW (6 letters), GRASP (5 letters), PLUMB (5 letters), GET (3 letters), SOUND (5 letters), KEN (3 letters), and DEDUCE (6 letters). Each of these words can be used to describe the act of fathoming something, whether it be through discovering, comprehending, understanding, measuring, discerning, appreciating, gauging, having, digging, knowing, probing, apprehending, following, grasping, plumbing, getting, sounding, kenning, or deducing.