dulcify

To sweeten the taste of.

To make sweeter or more pleasant.

And there was, to dulcify for her the bath of this evening, the yet sharper contrast with the plight she had just come home in, sopped, shivering, clung to by her clothes.

To neutralise the acidity of.

To mollify or make peaceful.

He knew all the things to say to dulcify his mother.