The Dhatu roop of Raksh in Sanskrit is "Rakshati."
stha
haha
There several places on the internet where you can find Sanskrit Dhatu roop of nam. On Allbookez website you will find free downloads in the format of an eBook.
The Dhatu roop of the verb "to eat" (bha) in the Lot Lakar in Sanskrit is "bhunkte."
shakati shakatah shakanti
bhavti bhavath bhavanti
patthi patthatH patthanti patthsi patthathH patthat patthami patthavH patthamH
dhatu roop of pach is the dhatu roop of pach.
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dhatu roop of tyaaj
The Dhatu roop of likh is likh.