Propitiate (verb)

1. To make amends or to regain the favor of someone, especially a god, by means of an offering or a sacrifice.
2. To appease or conciliate (a deity or spirit) by doing something to gain or regain its favor.

Origin:

From latin propitiare, from propitius ("favorable").

Examples:

1. The villagers propitiated the volcano god with sacrifices to prevent eruptions.
2. The king propitiated the gods by building a grand temple in their honor.
3. He propitiated the gods by performing a ritual sacrifice.
4. The people propitiated the spirits of their ancestors with offerings of food and drink.
5. The priest propitiated the deity by performing a ceremony of purification.