Srinivas Ramanujan.

Atharva SheerSha texts.

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While reading an article on climate-change,

I at once had a clue how the word originated in the first instance. To affirm correctness of my guess I had to recall a case of a famous Indian mathematician Srinivas Ramanujan who used to recite a mantra from his very childhood, without being told him by anyone else.

I am not going to share this mantra, but would restrict myself to the letter 'kleeM' that is a part of the mantra.

For me, the word Climate is a variant / cognate of the word क्लीं माते! 'KleeM-mate'.

शिव-अथर्वशीर्ष asks and answers :

Why Rudra is called "शुक्लम्" / "shuklaM"?

Because uttering His name, causes the clouds, and the humidity ... 

That is He (the Rudra-principle) alone governs the wetness / weather / climate. 

(the word "shuklaM" is again a variation of the verb root "क्लीं"/ "KleeM" - "क्लिद्यते" / "klidyate" / "क्लामयति" / "klAmayati, 'klid' / 'क्लिद्' gives us the word "cloud")

अथ कस्मादुच्यते शुक्लं यस्मादुच्चार्यमाण एव क्लन्दते क्लामयति च तस्मादुच्यते शुक्लम्। 

Gives the clue! Again, the word clue itself could be traced from "क्लीं" / 'KleeM'!

The words Wet and Weather are again cognates of the Sanskrit word 'वात' / 'वात्र' meaning both air and water and also a mixture of the two.

Devi Atharva SheerShaM deals with this truth in another way.

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