danger 危险。 opportunity 机会，机遇

危機與轉機 sounds like what you want. 危機 means crisis 轉機 means an opportunity (usually comes after a crisis) to change inferior. 機會 is just an opportunity, you can use 機會 in any condition.

I think 危机 is the word you are looking for!

I think you are looking for the usual word play on 危机， meaning crisis. The noun is construed to be made up of danger, 危险, and opportunity, 机会。 This is not necessarily the correct etymology, but is rather a latter-day interpretation.

danger means 危险，opportunity means机会，机遇