Where does “crisis” come from?

crisis (Old French) comes from Latin crisis, from Ancient Greek κρίσις, from Ancient Greek κρίνω, from Proto-Hellenic kríňňō, from Proto-Indo-European krinyéti, from Proto-Indo-European krey- — to sift, separate, divide.

crisis (Old French): crisis, emergency; urgent situation

Definitions

crisis, emergency; urgent situation

Ancestry of “crisis”, step by step

Step	Language	Word	Meaning
1	Latin	crisis	crisis
2	Ancient Greek	κρίσις	decision, determination, judgment; trial,...
3	Ancient Greek	κρίνω	To separate, divide, part, distinguish between...
4	Proto-Hellenic	kríňňō	—
5	Proto-Indo-European	krinyéti	—
6	Proto-Indo-European	krey-	to sift, separate, divide

Every word from Proto-Indo-European krey- →Every word from Proto-Indo-European krinyéti →Every word from Proto-Hellenic kríňňō →