What are the etymologies for the word Rudra?
There is a story in the Vedas where Rudra was born crying and then Brahma, his father, said "Don't cry", (mA ruda), so then he got the name "Rudra", or one who cries.
Another etymology is rukh draavayathi it rudra, which means "one who removes sorrow".
Wikipedia also says:
The commentator Sāyaṇa suggests six possible derivations for rudra. However, another reference states that Sayana suggested ten derivations.
What are some other etymologies?