___ on (ruminate about) (5)

I believe the answer is:
dwell
(Other definitions for dwell that I've seen before include "Focus attention (on)" , "Inhabit" , "Exist (within)" , "Hang out" , "Settle" .)
I believe the answer is:
dwell
(Other definitions for dwell that I've seen before include "Focus attention (on)" , "Inhabit" , "Exist (within)" , "Hang out" , "Settle" .)