This chapter defines the etymological constellation of the word kríno,, in which each critique and crisis takes place in particular sites of production on the basis of technologies and modes of existence. It outlines derivatives and idiomatic that always refer to meanings of specific, practical usage according to languages, dates, and cartographies. The Greek word kríno is the action of separating, picking, excluding, sieving, examining, opening, distinguishing, and differentiating a simultaneously analytical-contemplative and manual task. The chapter also discusses the medical use of krisis, which links together two levels of significance. One level is performative, in which the critical day of the illness or of the patient resonates. The other level is speculative which describes the moment of observation or medical diagnosis.