Where does “تجدید” come from?

تجدید (Persian) comes from Arabic تجديد, from Arabic جَدَّدَ — to renew.

تجدید (Persian): renewal

Definitions

Step	Language	Word	Meaning
1	Arabic	تجديد	verbal noun of جَدَّدَ; renewal, restoration
2	Arabic	جَدَّدَ	to renew

تجدید — Etymology, Origin & Word History | Etymology Explorer