(adj.) shameless, bold, impudent; made of brass

The antonym of rational or reasonable is

The synonym of instigator or motivation is

The synonym of shameless or bold is

First of all, the improvisation group members did not just choose a situation to act out in some random or arbitrary way. Instead they used suggestions from the audience as catalysts for their actions.

Arbitrary most nearly means:

First of all, the improvisation group members did not just choose a situation to act out in some random or arbitrary way. Instead they used suggestions from the audience as catalysts for their actions.

Catalysts most nearly means:

All the Evil Queen ever wanted to do was destroy, to ______everything around her for the wicked fun of it all.

It's entirely _________in some ways, but grief is not a simple process that you switch on or off.

While child abduction is nothing new, the perpetrators are becoming bolder and more ________, often committing crime in full view of the public.

With poor job openings there, the state also sees an annual _________of trained professionals to neighboring states, much to the detriment of it's already struggling economy.

Deafness is a _______that pushes many elderly people into seclusion, isolation, and even senility.

The storm annihilated the seaside town.

The students whined that the pop quiz was arbitrary and unfair.

Walking into class with a wireless speaker blaring was pretty brazen behavior, but Will didn't care if he got into trouble.

The scientists discovered a new catalyst to power automobiles.

Hurricane Katrina forced an exodus from many gulf state communities.