Where does “விருக்ஷம்” come from?

விருக்ஷம் (Tamil) comes from Sanskrit वृक्ष, from Proto-Indo-Aryan wr̥ṭṣás, from Proto-Indo-Iranian wr̥ćšás — tree.

Ancestry of “விருக்ஷம்”, step by step

StepLanguageWordMeaning
1Sanskritवृक्षa tree, any tree bearing visible flowers and...
2Proto-Indo-Aryanwr̥ṭṣás—
3Proto-Indo-Iranianwr̥ćšástree
Every word from Proto-Indo-Iranian wr̥ćšás →Every word from Proto-Indo-Aryan wr̥ṭṣás →Every word from Sanskrit वृक्ष →