deteriorate [dɪˈtɪəriəreɪt] v. 恶化，不断变坏，退化

例句 This would fit with what we already know about the effects of age on
memory—déjà vu is more common in younger people and trails off in old
age, as memory deteriorates.【2016-8《新科学家》】
这符合我们已了解的有关年龄对记忆的影响—似曾相识的感觉在相
对年轻的人当中更为常见，并且随着记忆的衰退而逐渐消失。
派生 deterioration [dɪˌtɪəriəˈreɪʃ(ə)n] n. 恶化，不断变坏