verb (used with object), pac·i·fied, pac·i·fy·ing. to bring or restore to a state of peace or tranquillity; quiet; calm: to pacify an angry man.

Is circumference a verb or noun?

the outer boundary, especially of a circular area; perimeter: the circumference of a circle. the length of such a boundary: a one-mile circumference.

Is pacify an adverb?

So as to pacify or calm.