placation (noun)

1. The use of peaceful colors and soft textures in the room created a sense of placation and tranquility.

2. The signing of the peace treaty between the two countries brought about a much-needed placation of their longstanding animosity.

3. The protagonist's heartfelt apology and sincere efforts for placation finally won over the trust of his former enemy.

4. In the futuristic society depicted in the novel, advanced technology was used for the placation of conflicts and the establishment of harmony.