Where does “Hasya yoga” come from?

Hasya yoga (English) comes from Sanskrit हास्य, from Sanskrit हास, from Sanskrit हस्, from Proto-Indo-Aryan źʰas- — to laugh.

Ancestry of “Hasya yoga”, step by step

StepLanguageWordMeaning
1Sanskritहास्यto be laughed at
2Sanskritहासlaughing, laughter, mirth; mocking, derision; a...
3Sanskritहस्laugh, smile
4Proto-Indo-Aryanźʰas-to laugh
Every word from Proto-Indo-Aryan źʰas- →Every word from Sanskrit हस् →Every word from Sanskrit हास →