Where does “நடைபடி” come from?

நடைபடி (Tamil) comes from Tamil நடை, from Tamil -ஐ, from Tamil தொல்லை, from Tamil தொலை — to become lost.

நடைபடி (Tamil): action, behavior, life, history

Definitions

நடைபடி traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Tamil	நடை	walk, walking
2	Tamil	-ஐ	makes nouns from verbs
3	Tamil	தொல்லை	annoyance, vexation
4	Tamil	தொலை	to become lost

Step	Language	Word	Meaning
1	Tamil	படி	to read, recite, chant
2	Sanskrit	पठ्	to read or repeat aloud, recite, rehearse
3	Proto-Indo-Iranian	*pl̥tH-	—