The crossword solutions for the term STEW (OVER) are OBSESS (6 letters) and FRET (4 letters). OBSESS is a verb meaning to think or worry about something constantly and excessively. It is derived from the Latin word obsessus, which means 'BESIEGED'. FRET is also a verb, meaning to be anxious or worried about something. It is derived from the Old French word fretter, which means 'to devour'. Both words can be used to describe the feeling of being overwhelmed by a situation, such as when one is stewing over a problem.