The term 'overly avid' can be broken down into two crossword solutions: 'RABID' and 'GAGA'. 'RABID' is an adjective meaning extremely enthusiastic or passionate, often to an excessive degree. It is derived from the Latin word 'rabere', which means 'to rave'. 'GAGA' is an adjective meaning excessively enthusiastic or foolish. It is derived from the French word 'GAGA', which means 'SENSELESS'. Both words describe someone who is overly enthusiastic or passionate about something, often to an excessive degree.