Origin of soothing
Examples from the Web for soothingly
There was no more aggression, and I even heard one of the men, in poor English, say soothingly that we were safe.
Rest perfectly easy, said Bronston calmly, soothingly almost, as he flung the strap aside and stepped back.Local Color|Irvin S. Cobb
"That was just the way of it," said Mrs. Forrester, soothingly.The Wizard's Son, Vol. 2(of 3)|Margaret Oliphant
The earl, whose arms seemed to have opened readily enough to receive her, was patting her soothingly upon the shoulder.The Lion's Skin|Rafael Sabatini
1590s, "flattering," from present participle of soothe. Sense of "mollifying" is from 1746. Related: Soothingly.