【电】 troubleshoot
barrier; handicap; obstruction; balk; clog; hedge; hindrance; hurdle
【化】 trouble
【医】 allo-; disorder; disturbance; dys
【经】 hurdle
repair; mend; fix; overharl; revamp
【计】 reconditioning; servicing
【经】 recondition; repair; repairs; reparation