IPA: /ˌdiːˈkɒmpənseɪt/
KK: /diˈkɒmpənˌseɪt/
To worsen in performance or health because the usual methods to manage problems or stress are not working anymore.
After months of stress, he began to decompensate and struggled to keep up with his responsibilities.
Past: decompensated
Past Participle: decompensated
Decompensate is formed from "de-" (meaning down or away) and "compensate" (from Latin "compensare", meaning to weigh together or balance). The word describes the process of losing the ability to maintain balance or stability, particularly in a physiological or psychological context.
Think of 'de-' meaning down or away, and 'compensate' meaning to balance — so decompensate means to lose that balance.