லட்சம் (Tamil) comes from Sanskrit लक्ष, from Sanskrit लक्ष्, from Sanskrit रक्ष्, from Proto-Indo-Aryan Hrakṣ-, from Proto-Indo-Iranian Hrakš-, from Proto-Indo-European h₂lek- — to protect.
லட்சம் (Tamil): lakh, one hundred thousand (100,000 or 1,00,000)