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Adjective: placatory  'pley-ku,to-ree or 'pla-ku,to-ree [N. Amer], plu'key-tu-ree [Brit]
  1. Intended to pacify by acceding to demands or granting concessions
    "placatory gestures"; "an astonishingly placatory speech";
    - appeasing, placating, placative

See also: conciliative, conciliatory