- Psychology. to lose the ability to maintain normal or appropriate psychological defenses, sometimes resulting in depression, anxiety, or delusions.
Origin of decompensate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
1912, probably a back-formation from decompensation. Related: Decompensated; decompensating.
Online Etymology Dictionary, © 2010 Douglas Harper