Ther e was a family crisis.
Our country may be in financial crisis in future
A crisis is a word categorized as being a noun. Therefore, one can say "I had a mid life crisis", or "The crisis was averted".
What is the crisis today that brings you late to work
He now faces another crisis in his helter-skelter existence.
We had to use quantitative reasoning to solve the energy crisis.
Due to his financial crisis, he opted out of the business venture.
How can you use the word infectious in a sentence
Since that is not a word I would not attempt to use it in a sentence.
You just did use the word colonize in a sentence.
The process of deregulation caused the 2008 financial crisis.
even in a crisis, we must hew to this nations principles of liverty, eqality, and justice
no such word as "reasonableness' you would have to use " reasonable conduct" in your sentence.