Source : WordNet®

keep down
     v 1: place a limit on the number of [syn: {number}]
     2: put down by force or intimidation; "The government quashes
        any attempt of an uprising"; "China keeps down her
        dissidents very efficiently"; "The rich landowners
        subjugated the peasants working the land" [syn: {repress},
         {quash}, {subdue}, {subjugate}, {reduce}]
     3: manage not to throw up [ant: {vomit}]