Where does “ردد” come from?

ردد (Arabic) comes from Arabic د, from Arabic اِسْتَخْدَمَ — to use, hire.

ردد (Arabic): to repeat

Definitions

Step	Language	Word	Meaning
1	Arabic	د	—
2	Arabic	اِسْتَخْدَمَ	to use, hire

ردد — Etymology, Origin & Word History | Etymology Explorer