Act as judge (10)
I believe the answer is:
adjudicate
(Other definitions for adjudicate that I've seen before include "Adjudge" , "Referee" , "Decide (between claims or in games)" , "award" , "Decide officially on a dispute" .)
I believe the answer is:
adjudicate
(Other definitions for adjudicate that I've seen before include "Adjudge" , "Referee" , "Decide (between claims or in games)" , "award" , "Decide officially on a dispute" .)