crisis

A crisis (: crises; : critical) is any event or period that will lead to an unstable and dangerous situation affecting an individual, group, or all of society. Crises are negative changes in the human or environmental affairs, especially when they occur abruptly, with little or no warning. More loosely, a crisis is a testing time for an emergency. Etymology The English word crisis was borrowed from the Latin, which in turn was borrowed from the Greek krisis 'discrimination, decision, crisis'. The noun is derived from the verb krinō, which means 'distinguish, choose, decide'. In English, crisis was first used in a medical context, for the time in the development of a disease when a change indicates either recovery or death, that is, a turning-point. It was also used for a major change in the development of a disease. By the mid-seventeenth century, it took on the figurative meaning of a "vitally important or decisive stage in the progress of anything", especially a period of uncertainty or difficulty, without necessarily having the implication of a decision-point.