The word Chaos is actually Greek; in Greek mythology khaos is the first being, the original state of existence. Chaos means the void. Other names for this have been given by various eastern traditions, such as parabrahman, shunyata, the infinite beyond conception, etc. all names for the Divine nothingness.
How ironic then, that the word used to describe the supreme state of existence, has come to mean discord, mayhem, disorder, confusion, madness, turmoil, disruption, disaster, etc.
Khaos, the divine reality which is the source of all peace & stillness, has come to mean the EXACT OPPOSITE.
This only goes to show humans complete ignorance & fear of the unknown. It shows humans complete aversion to death, nothingness, & non-being. It shows their complete attachment to living & not dying. It shows their duality consciousness. So much so that they used the word which represents the void to mean complete & utter disaster.
Most humans are so afraid at the idea of nothingness & death; trying to postpone the inevitable as long as possible. Clinging so desperately to something which is evanescent. That is exactly why they use the word chaos to mean disaster; the worst possible outcome.