Where does “अश्वशीर्ष” come from?

अश्वशीर्ष (Sanskrit) comes 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 “अश्वशीर्ष”, step by step

अश्वशीर्ष traces back through two separate lines of ancestry.

via Sanskrit अश्व

StepLanguageWordMeaning
1Sanskritअश्वhorse, stallion; knight; the number "seven"
2Proto-Indo-AryanHáśwas—
3Proto-Indo-IranianHáćwashorse
4Proto-Indo-Europeanh₁éḱwosstallion, horse
5Proto-Indo-Europeanh₁oh₁ḱu-swift

via Sanskrit शीर्ष

StepLanguageWordMeaning
1Sanskritशीर्षhead, skull
2Proto-Indo-Aryan*śr̥Hsá—

Words derived from “अश्वशीर्ष”

Every word from Proto-Indo-European h₁oh₁ḱu- →Every word from Proto-Indo-European h₁éḱwos →Every word from Proto-Indo-Iranian Háćwas →