tamp down
phrasal verbwithtampverbuk/tæmp/us
[T]
toreducetheamount,level,size, orimportanceof something:
As thepriceofgasolineroseabove $3 agallon,consumerscuttheirspendingelsewhere,tampingdownprofitsinretail,traveland otherindustries.
Thepartyretainedpowerbyboostingtheeconomyandtampingdowncorruption.