The term 'Tough to Figure Out' can be described by the following crossword solutions: KNOTTY (6 letters), TRICKY (6 letters), HARD (4 letters), ENIGMATIC (9 letters), and THORNY (6 letters). KNOTTY implies something that is complicated or difficult to understand, while TRICKY suggests something that is deceptive or requires skill to solve. HARD implies something that is difficult to do or accomplish, while ENIGMATIC implies something that is mysterious or puzzling. Finally, THORNY implies something that is difficult to deal with or has many complications. All of these words together describe something that is difficult to figure out.