The term GO ___ (DETERIORATE) can be solved by the crossword solutions SOUTH (5 letters), TOPOT (5 letters), and TOSEED (6 letters). SOUTH is a direction, and when combined with the verb 'GO, ' it implies movement in a downward direction. TOPOT is an anagram of the word 'POTATO, ' which is often used as a metaphor for something that is deteriorating or going bad. Finally, TOSEED is an anagram of the word 'desote, ' which means to become worse or to deteriorate. Therefore, all three of these words can be used to describe the term GO ___ (DETERIORATE).