For what it's worth, the NWS does give one hit for caṣa:

caṣa
https://nws.uzi.uni-halle.de/search?lang=en&utf8=%E2%9C%93&q=ca%E1%B9%A3a

Best wishes,
Martin


Den 2026-09-30 kl. 15:25, skrev Matthew Kapstein via INDOLOGY:
Thanks Madhav,

That confirms what I suspected was happening here. 

best,
Matthew 




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-------- Original Message --------
On Wednesday, 09/30/26 at 15:18 Madhav Deshpande <mmdesh@umich.edu> wrote:
Attestation or not, the word caṣaka is grammatically derived by adding the affix -ka to the base caṣa-. We have many other formations like this where the base by itself is not found in common use. For example, mūṣaka is common, but mūṣa by itself is not common.

Madhav M. Deshpande
Professor Emeritus, Sanskrit and Linguistics
University of Michigan, Ann Arbor, Michigan, USA
Senior Fellow, Oxford Center for Hindu Studies
Adjunct Professor, National Institute of Advanced Studies, Bangalore, India

[Residence: Campbell, California, USA]


On Wed, Sep 30, 2026 at 4:56 AM Matthew Kapstein via INDOLOGY <indology@list.indology.info> wrote:
Dear friends,

With thanks to those who corresponded with me about my puzzle, I have found an alternative solution, though one that involves another, perhaps lesser puzzle. 

The syllable preceding ṣāstriṃśat in my text is ca, which I had taken to be a conjuction. But if  we read caṣās triṃśat, "thirty caṣās," and take caṣa to be a contraction of caṣaka, then this would be mathematically appropriate in context (roughly, "thirty minutes in a half-hour"). However, I have not been able to find an attestation of caṣa for caṣaka. Has anyone seen this before?

many thanks,
Matthew


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On Wednesday, September 30th, 2026 at 11:04 AM, Matthew Kapstein <mattkapstein@proton.me> wrote:
Dear friends,

An astrological text I am studying contains the word
ṣāstriṃśat
which has me stumped. Perhaps it is a very odd way of representing 36, ṣaṭtriṃśat
but this strikes me as quite strange.
The reading is confrimed, however, by all four manuscripts that I am consulting, although they often disagree about other matters. 

I would welcome your learned suggestions.

thanks in advance,
Matthew


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