propitiatory

He whistled, a cheerful and propitiatory note, as he drove past the house to the barn.

A little later, while he was hanging them in the clothes-press, a propitiatory cough sounded at the door.

"I bought a book," he said, handing her the propitiatory volume.

Then he recognized Caldew, and smiled the propitiatory smile of one who had reason to fear the forces of authority.