Which word is spelled correctly?

Will Smith is a famous actor. What vocabulary word could replace "famous" in this sentence?

What word means: stir or disturb (something, especially a liquid) briskly.

The student council made a ____ decision to not have a carwash.

It is not kind to ___ someone from playing a game.

What word means: (of two or more people) fully in agreement;

Devin had a underhanded plan to get his sister in trouble. What vocabulary word could replace "underhanded"?

What word means: a situation that is unavoidable.

Which word is spelled correctly?

What word means: fail or neglect to do (something); leave undone.

What word means: fail to respect (someone's peace, privacy, or rights)

The waiter showed obvious favoritism for the rich couple and neglected to serve us. What vocabulary word could replace "favoritism " in this sentence?