attemper

To temper by adjusting relative quantities, or blending qualities.

To mitigate, assuage.

But we must add, that she did say, by way of attempering her pleasure: "Well! I must say I never saw a finer young man in my life—indeed I don’t know that the court of Great Britain quite boasts his equal...

To regulate, arrange, organise.

Thus fairely she attempered her feast, / And pleasd them all with meete satietie [...].

They tempt no conflict, no revenge provoke, But meet oppression in its daring course, With wisdom's ample shield, of Heaven attemper'd force.