| 1. | to make or become worse or inferior in character, quality, value, etc. |
| 2. | to disintegrate or wear away. |

deteriorate de·te·ri·o·rate (dĭ-tēr'ē-ə-rāt')
v. de·te·ri·o·rat·ed, de·te·ri·o·rat·ing, de·te·ri·o·rates
To grow worse in function or condition.
To weaken or disintegrate.