Stems from the Greek krisis, literally meaning “judgment” or “the outcome of a trial”. A crisis is essentially the situation that comes after a verdict from a figurative judge. It comes from krinein, literally “to separate, judge, or decide” which goes back to PIE *krei-, meaning “to sieve”. That verb also gave us critic (“one who judges”), riddle (“coarse sieve”), and hypocrisy through hypokrinesthai (“pretend or answer” from hypo- “under” + krinein, i.e. ‘answer’ an actor on stage).

Source