susceptible to deterioration

plural of deterioration

Causing deterioration.

A worse quality or state; inferiority.

Third-person singular simple present indicative form of deteriorate

present participle of deteriorate

getting worse

The process of making or growing worse, or the state of having grown worse.

(transitive) To make worse; to make inferior in quality or value; to impair. / (intransitive) To grow worse; to be impaired in quality; to degenerate.

simple past tense and past participle of deteriorate