verb (used without object), de·com·pen·sat·ed, de·com·pen·sat·ing.
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. 2019
1912, probably a back-formation from decompensation. Related: Decompensated; decompensating.
Online Etymology Dictionary, © 2010 Douglas Harper