rot

fe’l verb

1. To suffer decomposition due to biological action, especially by fungi or bacteria. The apple left in the cupboard all that time had started to rot.
2. To decline in function or utility. Your brain will rot if you spend so much time on the computer, Tony!
3. To make putrid; to cause to be wholly or partially decomposed by natural processes. to rot vegetable fiber
4. To spend a long period of time (in an unpleasant place). to rot in Hell

ot noun

1. The process of becoming rotten; putrefaction.
2. Decaying matter.
3. Any of several diseases in which breakdown of tissue occurs.
4. Verbal nonsense.