/ ˈpæsɪfaɪ; NAmE / verb ( paci·fies , paci·fy·ing , paci·fied , paci·fied ) [ vn ]
1.
to make sb who is angry or upset become calm and quiet
SYN placate :
The baby could not be pacified.
The speech was designed to pacify the irate crowd.
2.
to bring peace to an area where there is fighting or a war
► paci·fi·ca·tion / ˌpæsɪfɪˈkeɪʃn; NAmE / noun [ U ]
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WORD ORIGIN
late 15th cent. (earlier ( late Middle English ) as pacification ): from Old French pacefier , from Latin pacificare , based on pax , pac- peace.