derangement

Definitions

The state of being insane or mentally disturbed.

A state of confusion, disorder, or disarray.

A permutation of the elements of a set in which no element appears in its original position.

Examples

The sudden derangement of the financial markets left investors in a state of panic.

His erratic behavior was a clear sign of mental derangement that concerned all of his colleagues.

Synonyms

insanity madness mental instability psychosis lunacy dementia disorder

Antonyms

sanity lucidity rationality soundness of mind reason balance normalcy