placate
Concise Oxford English Dictionary © 2008 Oxford University Press:
placate /pləˈkeɪt, ˈplakeɪt, ˈpleɪ-/
▶verb calm, pacify, or appease.
– derivatives
placating adjective,
placatingly adverb,
placation noun,
placatory adjective.
placating adjective,
placatingly adverb,
placation noun,
placatory adjective.
– origin C17 (earlier (C16) as placation): from L. placat-, placare ‘appease’.
'placate' also found in these Oxford entries:

