mental deterioration

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

There had been appearances that showed his mental deterioration before that, and there would be others afterward.

From Slate • Jan. 9, 2026

Delaney would become a lifelong friend, even after he began suffering from mental deterioration, dying after years of hospitalization in 1979.

From Los Angeles Times • Aug. 18, 2025

Press should report this as incoherent, displaying mental deterioration.

From Salon • Aug. 13, 2024

The symptoms of Huntington’s disease, mental deterioration and uncontrollable movements, usually do not appear until middle age.

From Textbooks • Jan. 1, 2018

However, by all indications, my own mental deterioration will be quite rapid.

From "Flowers for Algernon" by Daniel Keyes