rot
UK[rɒt]US[rɑːt]
v
To decay or cause to decay by the action of bacteria and fungi; to decompose.
n
The process of decaying; a state of decay.
n
Nonsense; foolish talk.
Etymology
The word 'rot' has a direct and ancient lineage from Proto-Germanic rutōną, meaning 'to decay'. This term is part of a family of related words in Germanic languages, such as Old Norse rotinn (rotten). While its ultimate Proto-Indo-European origin is uncertain, it is firmly established in the core vocabulary of English. The semantic journey is straightforward, maintaining the core concept of decomposition from its earliest uses. The figurative sense of 'nonsense' developed later, metaphorically extending from the idea of something being morally or intellectually corrupt or worthless.
Analysis
This is a simplex word of Germanic origin. The Old English root rotian (to decay) functions as the core verb, and the related noun rot (decay) is derived from it.
Examples
The fallen leaves began to rot on the damp forest floor.
Dry rot had severely damaged the wooden beams of the old house.
Don't talk such rot; your argument makes no sense.