Adjudicate
'adjudicate' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for arbitrate that I've seen before include "Mediate" , "Act between disputing parties" , "judge" , "Adjudge" , "Decide" .)
'adjudicate' is the definition.
(synonyms)
This is all the clue.
(Other definitions for try that I've seen before include "Examine" , "A rugby score crossing the line" , "Go" , "Endeavour" , "Attempt a score" .)