The term 'slow boil' is a cooking technique that involves simmering or stewing food at a low temperature for an extended period of time. The two crossword solutions for this term are 'STEW' (4 letters) and 'SIMMER' (6 letters). Stewing is a slow-cooking method that involves cooking food in liquid, while simmering is a cooking technique that involves cooking food in liquid at a temperature just below boiling. Both techniques are used to slowly cook food over a long period of time.