Where does “इससा” come from?

इससा (Hindi) comes from Hindi इस, from Prakrit 𑀅𑀲𑁆𑀲, from Sanskrit अश्व, from Proto-Indo-Aryan Háśwas, from Proto-Indo-Iranian Háćwas, from Proto-Indo-European h₁éḱwos, from Proto-Indo-European h₁oh₁ḱu- — swift.

Ancestry of “इससा”, step by step

इससा traces back through two separate lines of ancestry.

via Hindi इस

StepLanguageWordMeaning
1Hindiइसthis - oblique case only, see below for direct;...
2Prakrit𑀅𑀲𑁆𑀲of this
3Sanskritअश्वhorse, stallion; knight; the number "seven"
4Proto-Indo-AryanHáśwas—
5Proto-Indo-IranianHáćwashorse
6Proto-Indo-Europeanh₁éḱwosstallion, horse
7Proto-Indo-Europeanh₁oh₁ḱu-swift

via Hindi सा

StepLanguageWordMeaning
1Hindiसाthe first note of the Indian solfege – षड्ज
2Sanskritसमsame, equal, alike; equivalent to, like,...
3Proto-Indo-IraniansamHássame, equal
4Proto-Indo-EuropeansomHóssame, alike
5Proto-Indo-Europeansem-together, one
Every word from Proto-Indo-European h₁oh₁ḱu- →Every word from Proto-Indo-European h₁éḱwos →Every word from Proto-Indo-Iranian Háćwas →