Verb

(head)

(deteriorate)

Verb

(deteriorat)

To make worse; to make inferior in quality or value; to impair.

to deteriorate the mind

* Southey

The art of war, like every other art, ecclesiastical architecture alone excepted, was greatly deteriorated during those years of general degradation

To grow worse; to be impaired in quality; to degenerate.

* {{quote-news

, year=2011 , date=January 8 , author=Paul Fletcher , title=Stevenage 3 - 1 Newcastle , work=BBC citation , page= , passage=It was turning into an abysmal afternoon for Newcastle and it deteriorated further when Tiote saw red for his challenge on Jon Ashton. }}

Verb

(en verb)

To make worse; to impair.

* The global warming has worsened the weather.

* Southey

It is apparent that, in the particular point of which we have been conversing, their condition is greatly worsened .

To become worse; to get worse.

* The weather has worsened .

(obsolete) To get the better of; to worst.