The term 'brood over' can be defined as to think deeply and anxiously about something. The crossword solutions for this term are 'MEDITATE' (8 letters), 'eggs' (4 letters), 'FRET' (4 letters) and 'STEW' (4 letters). Meditating is a form of deep contemplation, while fretting and stewing are both forms of anxious thinking. Eggs are often used as a metaphor for new beginnings, which could be related to the idea of brooding over something.